How to Fix iMessage
How to fix
(also Appstore, iTunes & iCloud)
18-10-2014: Information for OS X 10.10 Yosemite.
09-10-2014: Added warning Step-5f: Using leached ID's
04-10-2014: Big update to Step 5d - MLB & ROM values
25-09-2014: Simplify Step-2 - Check Network Interfaces
22-09-2014: Updated Info on iMessage Customer Code issue
04-09-2014: Update Step 5d - Persistent MLB & ROM Values
29-08-2014: Add Step 5e - Clarify NVRAM plist reset
26-08-2014: Update Step 5d for Clover Users (MLB & ROM)
18-08-2014: Added Section 5d - iMessage Debug utility
10-08-2014: News: Recent iMessage Outages
09-06-2014: Add Important note about S/N changes to Step 3
08-06-2014: Add NIC EFI injection to Step 2
19-05-2014: Part-2 of the guide moved to Post #2
18-05-2014: Confirmed Working - OSX Mavericks 10.9.3
15-05-2014: Update Step 5C for Chimera V3.0+ users
23-04-2014: Re-write and simplify Step-2
17-04-2014: SId Bug Fix and UUID miss-match
10-04-2014: New iMessage issues identified
31-03-2014: Rewrite Step-5c and consolidate notes
30-03-2014: Updated info on Credit Card expired
06-03-2014: Updated info on issue effecting RAID users
03-03-2014: Updated info on Apple ID validation check
02-03-2014: Reformat and re-order entire guide
02-03-2014: Confirmed Working - OSX Mavericks 10.9.2
30-12-2013: Confirmed Working - OSX Mavericks 19.9.1
26-10-2013: Updated info on BSD Name issue
24-10-2013: Confirmed Working - OSX Mavericks 10.9.0
30-09-2013: First release of guide made public
25-08-2013: Confirmed Working - OSX Mountain Lion 10.8.5
01-08-2013: Confirmed Working - OSX Mountain Lion 10.8.4
OSX 10.10 Yosemite and iMessage
With the public release of OS X 10.10 comes a new iMessage and as expected a few new iMessage issues.
The Good News
If you followed my advice from the last six months and you've already made the transition to using Clover as your boot-loader then the good news is you don't have to do anything in order to get iMessage working. If your not already using r2953 then i would advise that you update Clover before installing OS X 10.10.
I made a Unibeast 5 USB installer for OSX 10.10 and simply installed OS X 10.10 over my existing Mavericks install (just like a real mac) after the install finished I re-booted again with the Unibeast USB still in place and loaded the new OS. Once loaded I used the latest version of Multibeast to update all critical kext's such as FakeSMC, Audio, Trim, Ethernet ... etc, after a little bit of fine tuning i removed the Unibeast USB and rebooted back into OS X 10.10 via Clover. Finally I ran iMessage Debug to ensure that all my ID's were the same as before the update and iMessage is working great, love the updated look, notifications ... etc
Please ensure that you use the new kernel boot flag 'kext-dev-mode=1' otherwise some 3rd party kexts might not load, in Clover Configurator simply tick the option in the kernel boot options.
The BAD News
If you not using Clover as your boot-loader then you will not be able to use iMessage, it as simple as that at the moment. I will not be adding a method for installing Clover to this guide as its off topic and there are many ways it can be done. There are loads of guides and resources out there, find one that works for your level of knowledge and understanding.
It is very unlikely that the older method of using FileNVRAM (see Step 5) will be updated to work with OS X 10.10, I'm not saying that it won't happen, and I hope that it does, otherwise what use is Chimera and Chameleon ?, but you should realise that the way Clover works is light years beyond these old (legacy) methods of running OS X and it would require a big re-write to catch up see post #1624 for a bit more info.
Those of you not using clover and have already tried to get OS X 10.10 working, I suggest that you go back to your 10.9.x backup and get Mavericks working with Clover first, that way you'll reduce the amount of issues you have to deal with in one go as your working with a known good build.
If you've not tried Clover yet and you don't understand how UEFI booting differs from legacy booting then it might be worth reading up on that first before installing Clover, try starting with this guide here.
Once you have Clover working use the Clover tips in each section of the guide to resolve iMessage issues such as Sid bug and non persistent ROM & MLB values ... etc, if you had already fixed all of the issues using the older methods you can use all of your existing ID's with Clover which should reduce any device changes be detected by Apple.
Contact Apple with Customer Code Alert
If you get a iMessage alert asking you to contact Apple with a customer code there is nothing you can do locally to resolve the issue, the customer code must be applied to your AppleID to unlock iMessage on your device, this can only be done by Apple (this will not effect any mobile devices ability to send/receive messages such as iPhone, iPad .. etc)
Recently many more users are seeing this alert, I believe that Apple have made further changes to security checks on their systems in early August 2014. The above message is explained in further detail in Part-2, Step-8 of this guide.
If this is the first time you have got this message then I suggest that you check ALL your ID's to ensure they are the correct syntax and are persistent on each boot. Many installs allow the ROM & MLB values to change on each boot or have a miss-matched System Type and/or S/N. If this happens then you will continue you get this message again after a few weeks.
This guide covers all of the necessary checks and provides the solutions, I recommend that you read the entire guide at least once as you will learn a lot about debugging iMessage, as a very minimum if you are getting the above alert then I suggest the following :-
- Read Part 2 of the guide up-to Step 7, check if you have the SId bug, if so fix it
- Check your S/N is correct for the System Type you are using - see Part-1, step 3
- Check for persistent MLB & ROM values, see Part-1, Step 5d
- If you changed anything in steps 3,5 or 7 then perform all of step 4 and 5e
Once your ready to contact Apple use the method described in Part-2 Step 8 of the guide which should get you through to correct support department without them asking you too many questions.
Only contact Apple if you get the above message with a Customer Code.
If you are getting the more generic login or authentication alerts then use the guide to resolve your issues, at some point you may start getting the above alert in which case iMessage is now working on your OSX system but you must contact Apple to remove the device/AppleID lockout.
Before jumping to the conclusion that your iMessage problem is local to your OSX machine its always worth checking to see if there is a more general service outage. you can check the official status of Apple's backend systems here :-
yo can also track iMessage issues in your country by using Down Detector :-
For USA use this link:-
For UK use this link:
(for other countries use either of the two links and click on the appropriate country flag on the right)
If you find this guide helpful please consider clicking on the 'Recommended' button at the top of this page, doing so will help to keep the link to the guide on the home page making it much easer for others to find.
iMessage Guide News:
5th Sept 2014: Potential new iMessage issues coming in the next few weeks
As a result of the recent iCloud hacks on so-called 'celebrities' iCloud accounts, Tim Cook has officially stated that Apple it will be working to implement further security checks on its backend systems over the next few weeks.
News of the imminent changes were posted in the Wall Street Journal :-
I guess we'll just have to wait and see if these changes effect iMessage .....
iMessage outages 8/9/10 Aug 2014
More info at Post#955
It looks like those users who thought iMessage stopped working after installing the latest iTunes 11.3.1 update could have been unlucky and the iTunes update was just coincidence. There are many reports that there was a major iMessage outage on the 8th of Aug:-
It seems to have predominately effected iMessage users in the USA and the UK, these problems seem to coincide with Apples roll-out of the new iCloud data centre in China.
Case Study: 6th Aug 2014 - iMessage/MAC address issue
The Other day i updated one of my systems to a new Motherboard and CPU, however i recycled the WiFi card which resulted in iMessage issues. See post #897 for more information.
Update: 19 May 2014 - Part-2 of the Guide moved
Please note that Part 2 of this guide now follows directly below Part-1 (Post #2) and is no longer at post #404, If you find any links in the guide not working please let me know.
Update: 15th May 2014 - Chimera 3.0 and later.
If you have installed or updated to Chimera Version 3.0 or later be sure to read Note 4 in Step 5C.
Update: 17th April 2014 - New iMessage issues & the SId Bug
Apple have recently made some changes on their iMessage relay servers that can cause new issues for hackingtosh systems that iMessage was working perfectly on.
Symptoms of these new issues include all contacts in iMessage displaying in red text, and at least two previously unseen alert messages. It does not effect everyone but it does appear to be effecting users of Gigabyte GA-Z77-UP5-TH motherboards, there are reports of the same issue's occurring on other hardware too.
If your new to iMessage and/or this is your first time visiting my guide then I would suggest that you carry on reading and start with Part-1 below, it details important basic information you need to know and understand in order to get iMessage working on any hackingtosh computer along with the more common issues seen, only move on to part-2 if you need to.
iMessage - Apple's cross-device, instant messaging system built into OSX (and IOS) is quite possibly the most finicky software element to get working correctly when OSX is running on non-Apple hardware.
As you will find, there are many different factors that can effect iMessage and stop it from working and I am quite sure that there are still more to be found, I will continue to update the guide as new solutions are found and confirmed.
I would suggest that you read through the entire guide first and digest each of the steps before making any changes to your system. I have tried to explain the reasons behind each issue and solution. I believe that its important to learn and understand how things work, anybody can upload a file and tell you what to do with it but nobody learns from that, some steps of the guide are critical, others are optional - this is made clear at each step of the guide.
It is best to think of this guide as a 'Tool Box' rather than a step by step guide, although i have tried to put the guide into a logical order, solving iMessage can be a nightmare but armed with all the knowledge contained in Parts 1 and 2 of the guide you should be able to resolve most iMessage issues, I apologise for the length of the guide, however as you will find out there is a lot to cover.
Before you start make sure you've got an up-to-date TM or CCC backup, there is nothing here that should cause any problems, all the steps are relatively straight forward and easy to apply, just take your time and be sure to follow the instructions carefully. I am not responsible for any damage or loss of data you may incur by using this guide.
Important info for Apple RAID users
If your using Chameleon or Chimera as your boot loader and boot OSX from a Apple software RAID (or Fusion drive) then there is an added complication (this does not effect users of Clover so you can skip down to the next section).
To negate this complication you must clone your RAID volume to a standalone HDD using Carbon Copy Cloner or similar utility, install Chimera and modify the chameleon plist in /Extra so that you can boot OSX from this non RAID clone (be sure to remove Kernel Cache=Yes and the RAID uuid from the boot flags). Once booted from the clone HDD, apply the necessary steps from the guide to get iMessage working.
When your happy that everything is working ok, take a deep breath and delete your existing RAID set, it's also worth erasing the two RAID member drives just so you know that everything is fresh and makes for a good opportunity to update your boot loader, then re-create your RAID so a new RAID uuid is generated,
Now clone the standalone HDD back to the new RAID set, make the RAID bootable by installing the boot loader via the command line method to each of the RAID helper partitions and copy the entire /Extra folder to the two RAID helper partitions, be sure to edit the chameleon plist so that it boots using the new RAID uuid and Kernel Cache=Yes.
Its sounds a pain and it is, it's time consuming and carries a certain amount of risk but all OSX software RAID users should be familiar with this method as its how we get our RAID's woking in the first place, so if you think of it along those lines and it wont seem quite so daunting, just be sure to cover yourself with multiple backups if possible.
Warning: If you don't understand the above then please stop now, do some research and make yourself familiar with the way a OSX RAID is created and made bootable on a Hackingtosh system, you can use this guide as a starting point. Please be sure to read the additional RAID notes towards the end of the guide.
August 2014: Anyone running a Raid or Fusion drive should seriously think about changing to Clover as a boot loader as it resolves all of the above problems. On my GA-Z77X-UD5H i had an old 40Gig SATA-II drive kicking around. I installed clover on to that and set it as the UEFI Boot drive. I can now start OSX up from the Raid without having to use helper partitions .. etc. I've added many tips to the guide to cover each issue for Clover Users.
Step-1: Credit Cards and Verifying your AppleID
There are four different types of AppleID account:-
- Basic Verified
- Pro (Verified)
- Developer (Verified)
It doesn't matter what type of account you have or if your AppleID is registered as @me.com, @mac.com, @icloud.com or a non-Apple email address, if your going to use it with iMessage it must be verified and the easiest way of making your AppleID verified is to register a credit card against it.
You can check the 'Verified' status of your AppleID by logging into Apple's on-line Account manager :-
By registering a credit card against your Apple ID, Apple's servers and systems know that your AppleID has a verified name and address, the main reason behind this is to stop people from creating false AppleID's and using them to send spam.
The most secure way to register a credit card against your AppleID is through iTunes or the App Store, do not use a web address in a browser, there have been several reports of fake AppleID phishing sites, most of these scams work via fake emails that contain a rouge link to a fake AppleID log-in page, the email usually asks you to confirm or update your AppleID, don't be fooled even if the address looks like it might reside on legit server.
Note: Some users have reported success at using their PayPal Account as a means of AppleID Verification and payment. I personally can not confirm this but there are positive posts on this thread that it works, if you do try this and it works for you then please post some feedback.
For veteran OSX users its possible that you have an old AppleID (@mac.com ..etc) which you haven't used for a while, but if it has a credit card registered against it that is still current then you could try using it to test iMessage.
If your AppleID already has a Verified status but you are still having trouble with iMessage login or authentication, you could try changing your AppleID password, this is one of the oldest tricks in the book for resolving iMessage login issues. It has also been reported that sometimes updating your account details (address ..etc) or purchasing something from the AppStore or iTunes (even a free item) can also revive iMessage functionality.
Do not be tempted to remove your credit card info once your account is verified, iMessage will stop working at some point if you do.
You should also be aware that once the credit card expires on your AppleID, you are given a grace period which seems to be around 30 days to register a new one. If you do not register a new, valid credit card within the grace period, iMessage will stop working.
Step-1 Summary: Your Apple ID must have a Verified status and a valid credit for iMessage to work.
Step-2: Check your Network Interfaces.
Open 'System Information' [About this MAC -> More Info -> System Report] and click on 'Ethernet Cards' , you should see a list of installed NIC's on your system, for each NIC you will see a list of parameters such as Type, Bus, VendorID, DeviceID ... etc
Look at the parameter called 'BSD name' for each of your network interfaces, they should be called 'en0', 'en1' ... etc
I have a Gigabyte GA-Z77-UD5H motherboard's which has two built-in LAN ports (Intel and Atherios). In this example I could access the internet and email on either port but could not use any Apple on-line service such as iMessage, iCloud, App Store and iTunes (on either port).
On investigating my BSD names I found that the Intel port was named 'en2' and the Atherios port was 'en1', there was no 'en0' .... how this occurred during OSX install i'm not sure ? but I've seen this happen more than once on different systems.
If you find that you have no 'en0' or have 'gaps' in the BSD Names number sequence then it seems to stop all of Apples iCloud services from working.
The easiest thing to try first is to delete the file:-
Empty the trash and reboot.
OSX should re-discover all your Network Interfaces and rebuild the NetworkInterfaces.plist hopefully with the correct BSD names. If the BSD names are still not correct and you have add-on NIC's such as PCI or USB then try removing all of them and delete the file again, reboot and let OSX assign the 'built-in' NIC's first, then re-install your add-on NIC's one by one.
This method has a 60% chance of working .... if not then a re-install usually does the job.
You'll know if this particular issue is resolved once you can use some iCloud service such as the App Store and Software updates, but iMessage may still not work....
It's always worth checking your BSD names first-thing after a OSX install, or after you've added or removed any NIC's. As stated above, if your system has 'built-in' ethernet port(s) then the BSD names should start with those first and then cover any additional 'add-on' NIC's such as WiFI or USB, make sure they start at en0 and are numbered sequentially with no gaps.
If all your Network Interface's have good BSD names then it time to check if they are flagged as 'Built-In'.
For this task I recommend using DPCIManager 1.5, which you can download from here:-
Once installed run it and make sure your on the 'Status' tab, the top part of the Status screen will identify all your network interfaces and display their BCD names, as explained above, the BCD names should start at 'en0', additionally the 'Builtin' check box next to each interface must be checked for iMessage to work on each of the detected network interfaces.
if you do have this key and string in your plist but the 'Built-in' check box is not ticked then click on the 'eye' icon for the appropriate interface (at the right hand side of each entry), you will be given an EFI string that you can add to your boot.chameleon.org.plist in /Extra, this string is required for correct iMessage operation, for most users the Boot-Loader will identify the correct EFI string and automatically inject it, however in some rare instances this does not work in which case you should manually inject the NIC(s) EFI string(s) identified by DPCIManager.Code:<key>EthernetBuiltIn</key> <string>Yes</string>
If it does not work straight away, you may have to try one or two of the other steps such as deleting all previous iMessage setup data (See Step 3 below), reset password, delete nvram.uuid.plist in /extra ... etc.
All of my hackingtosh builds are using 'en0' and 'en1' for the on-board ethernet NIC's, if you have both ethernet and WiFi like my trusty Sony Vaio-SE2 laptop hackingtosh, the LAN port should be assigned to 'en0' and the WiFi should be 'en1' (see above DPCIManager 'Status' screen grab).
I personally recommend that you get iMessage working on a wired interface before moving to WiFi, if your working on a new build its best to get everything else working via wired network then add/enable the WiFi interface. If you jump straight to the WiFi interface then you may experience odd BCD NIC naming.
There is a bit more information on the issue with BSD names and a possible way to avoid the problem in the future here.
Step-2 Summary: Network BSD names should be 'en0', 'en1' ... etc sequentially with no gaps.
Step-3: OSX S/N, SMBIOS and the Boot-loader
OXS Serial Number
It is critical that you have a unique OSX Serial Number (S/N). Under no circumstances should you use someone else's OSX S/N it isn't necessary and can cause a miss-match with your System Type and lead to security issues.
Important: Try to keep the number of times you change the OSX S/N to an absolute minimum as Apple will detect the change against your devices UUID, if done too many times Apple will block your device's UUID against your AppleID (See Part-2 of the guide for more details on this, you can override your SystemId (UUID) by means of the SId Bug fix). While resolving some iMessage issues like BCD names and fixing ID's I recommend going off line that way you avoid Apple's servers detecting any changes which could be flagged as a miss-matches.
If using Chameleon Wizard or the 'Magic Wand' in Clover Configurator then you should be aware that your S/N will change automatically when you select a pre-made SMBIOS. The System Type is also defined in-part by the first two digits of the S/N which can be either 'CK' or 'CO'. When you use a pre-made SMBIOS's the first two digits of your S/N will be set to the required 2 digit code.
I suspect that some users are manually editing the SMBIOS.plist (or Clover's config.plist) and changing the System Type without changing the S/N if necessary, thus causing a S/N - System-Type miss-match.
Note: Changing your OSX serial could lead to some user profile settings being reset such as Mouse settings and Launchpad layout.
System Type & SMBIOS
Its very important that you match the 'System Type' to the PC hardware you have in your hackingtosh for maximum system stability and performance.
My SMBIOS Desktop System Type Recommendations :-
- If using CPU earlier than Sandy Bridge use Mac Pro 3,1 <-- 11 Digit S/N ?
- if using Sandy bridge with Intel 6 series motherboards use Mac Pro 6,1 or iMac 13,1
- For Intel 77 chipset systems try iMac 13,1 or 13,2
- For Intel 87 chipset systems try iMac 13,1/2 or 14,1/2
- For Intel 79/89 chipset systems try Mac Pro 6,1
If you have a laptop or are not sure which System Type to use, download and install MAC Tracker ... compare the hardware of the various Apple Model types with the CPU and Motherboard chipset generation you are using, don't worry too much about the video type as you can override this using Boot-Loader options. Whats important is to try and match the CPU and Chipset as close as possible. OSX internal optimisations for Ivy & Haswell CPU based systems will only be activated if using the correct system Type ID (SMBIOS). If you are using Thunderbolt then make sure that your System Type matches a Apple MAC type that has also has Thunderbolt.
Although many OSX Hardware build guides recommend using Mac Pro 3,1 because its considered 'safe' it can cause issues with iMessage because it has a 11 digit S/N - which in-turn can effect the MLB value.
OSX look's at your hardware and compares the System Type ID with your internal hardware in order to optimise some OSX kernel features. EG you have a Haswell Z87 Based system but are using Mac Pro 3,1 which is pre Sandy Bridge Architecture ... in some cases this seems to cause issues with certain system values. Mac Pro 3,1 was discontinued in 2009 making its hardware specification over 5 years old - in PC technology terms this is light years.
Updating SMBIOS - Chimera or Chameleon method
Open Chameleon Wizard and click on the 'SMBios' icon then 'Open' and navigate to the /Extra folder in the root of your startup disk and select your SMBIOS.plist.
Note: OSX RAID uses will have to mount the two RAID helper partition(s) to access the /Extra folders - see here.
Once your SMBIOS is loaded in the editor, Selecting a pre-made SMBIOS will automatically fill-in all the details and ensure that the 1st two digits of the S/N are correct for the system type you have selected (see Important note above).
Once your happy with the Systems Type, click a few times on the two <Random> buttons to generate a new batch number and week of manufacture then click on 'Save', if you boot from a OSX RAID then use the 'Save As' button to save the updated SMBIOS.plist to the two raid helper partition(s) - see here.
Updating SMBIOS - Clover Method
If using Clover, mount the EFI Partition and run Clover Configurator. Load you config.plist and select the SMBIOS page. You can use the 'Magic-Wand' to select a pre-made SMBIOS. You can manually update any of the values if necessary.
Note: This is also the page where you can manually inject a custom SmUUID (SystemId) See Part-2.
If your using Chimera (or Chameleon) as your boot-loader then ensure that the core version is 2.2 or later, if not then download and install the latest version of Chimera from the downloads section of this website or use Chameleon Wizard to update the Chameleon Boot-Loader before going any further.
OSX RAID users will need to manually install Chimera (or Chameleon) by extracting the '/usr/standalone/ i386' folder from the boot-loader install package (I use Pacifist) and then use terminal commands to install the boot-loader files on to your RAID helper partitions - see this guide if your not familiar with the procedure.
Time to switch to Clover ....
As of mid 2014 I recommend everyone take a look at using Clover as their boot-loader, it's been written from the ground up to work with newer hardware and addresses many of the problems that cause iMessage to fail when using Chimera or Chameleon. I know a lot of you may think it's more complex than the older boot-loaders that your used to but in reality it's not that much different and gives you far more control and solves so many problems especially for Raid and Fusion drive users (no more cloning to fix iMessage).
I think much of the confusion is more to do with understanding UEFI rather than Clover itself, if your not sure then it's worth searching for and reading a guides that explain how UEFI booting works before jumping straight into Clover.
If you find that you have hardware that does not work with Clover try getting in-touch with the developers, they are keen and clover has nightly builds. I personally think Clover is the future for all of us, you just need to devote some time to it, i promise once you make the switch you'll never go back.
Step-3 Summary: You must have a unique OSX Serial Number, correct System Type and up-to-date OSX boot-loader.
Step-4: Remove existing iMessage data & configuration files
If you are starting with a clean OSX install then there is no need for you to perform this step so jump forward to Step 5, however if you have been trying to get iMessage to work for sometime then the chances are that the iMessage plists are full of invalid data and/or settings.
Ensure that you have ‘Show all Files’ or similar utility for displaying hidden files and folders in Finder.
You can download 'Show all Files' form the community section.
Enable ‘Show all Files’, start-up Finder and navigate to:-
Delete all files beginning with the following prefixes:-
Now navigate to:-
Delete all files beginning with the following prefixes:-
Now delete the folder:-
Note: This folder is your local message store, if you want to keep your existing messages make a backup of this folder before removing it, once i message is working you can restore the backup or recover it from a Time-machine backup.
You can switch off 'Show all Files' now.
You should not loose any messages or contacts by performing this action as both are stored in your iCloud account and should sync up again once iMessage is working correctly.
Update: Aug 2014
After a 'glitch' in Apples backend servers that occurred sometime around the 8th or 9th of August 2014 many users found that they were unable to reactivate iMessage despite following the above and the other tips in this guide.
If you have tried all the guides steps and iMessage is still not working then you could try the following:-
With 'Show all Files' enabled navigate to:-
Delete all files beginning with the following prefixes:-
This should be done in conjunction with all of Step-4 (remove all other iMessage plists)
Some users have found that they were unable to delete the security plists because they are being accessed by the security processes. If you find this is the case, open Activity Monitor and kill securityd_service, then securityd and try again (you may have to do this a few times before you can remove the plists)
Ensure you empty the trash before rebooting.
This optional step has been confirmed working by myself and several other users on this thread who were affected by this recent iMessage issue. Removal of these plists has not caused any additional side effects however as with all things Hackingtosh be sure you have a backup before you implement this fix. Any positive or negative feedback from applying this fix would be appreciated.
Step-5a: NVRAM - The Problem
On all genuine Apple Mac's, OSX stores some critical system keys and values in Non Volatile RAM rather than writing them to a config file or plist on your startup drive. The NVRAM is Apple bespoke hardware built into a MAC's system board and forms part of Apple's OSX authentication system, as such PC motherboards & laptops do not have this hardware.
iMessage stores several important key values in NVRAM some of these values form part of a long chain of crypto key's used by OSX for keeping content secure, an important factor in Apple's on-line eco system and one which iMessage relies on. If certain keys are not saved in NVRAM then the next time the system is powered off or re-booted iMessage may suffer from login and/or activation problems.
There has been much work done in the community to try and resolve this issue and the latest versions of Chameleon and Chimera include a fix that try's to maintain these critical values in OSX's NVRAM cache. However for reasons outside the scope of this guide it does not work reliably for everyone.
Step-5b: NVRAM - The Solution
Clover automatically builds a much more complete NVRAM cache at boot time, OSX reads nvram values from the cache rather than the slow Non Volatile RAM as such this negates most of the problems associated with not having the NVRAM hardware, please skip down to Section 5d.
Chameleon and Chimera Users:
Hackingtosh wizard xzenue has written a boot-loader module called 'FileNVRAM' that simulates Apple's Non Volatile RAM hardware through software emulation and store's the NVRAM keys and values in a plist called nvram.xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx.plist located in the /Extra folder of your OSX startup drive.
The nvram plist is automatically generated by the FileNVRAM module the first time it is initialised and allows OSX to maintain NVRAM keys and values through power cycles and reboots. Depending on your system type, additional OSX settings may be written to the simulated NVRAM such as brightness & volume levels.
You can check the content of OSX's NVRAM by starting a terminal window and typing 'nvram -x -p' and pressing return (do not include the quotes), the resulting output should list the current contents of the NVRAM, please note that many of the key values are encrypted or displayed as base64 values.
Step-5c: NVRAM - Installing FileNVRAM
For older systems (pre Chimera 2.6) download the attached file ‘modules.zip’ and extract it, the contents are a folder called 'modules' that has a single file in it named 'FileNVRam.dylib', copy the ‘modules’ folder and paste it in the ‘/Extra’ folder in the root of your startup drive
Important: Because of the way FileNVRAM works it must exist in /Extra/modules in the root of your OSX Start-Up Drive, if you boot using a USB key or from another drive the you need to address this before continuing. Normally this will involve using the stand-alone installer for your chosen boot-loader and install it on you OSX drive - RAID and Fusion drive users may have to use the terminal method to install the boot-loader - see both sections of the guide that deal specifically on Raid (Fusion) drives.
Remember you only need to install FileNVRAM if your using Chameleon or Chimera, if your using Clover as your boot loader then you should skip down to the next step.
For Systems that already have a 'modules' folder in /Extra then download the additional attached zip file that contains both versions of FileNVRAM (V1.1.2 & 1.1.3) and use the required version (see note 4 below)
Important notes about installing NVFileRAM:-
1. More recent versions of Multibeast now create the 'modules' folder in /Extra and place other '.dylib' files inside it, if you already have a 'modules' folder then just merge the contents of the attachment with the existing folder.
2. If you use the tip to move the /Extra folder and boot-loader files to the unused EFI partition then the chances are that FileNVRAM will not work for long, it is similar to the issue that effects RAID users in that once OSX is booted the EFI partition is unmounted so OSX no longer has access to the nvram.uuid.plist. To resolve this issue move the /Extra folder to the root of your startup drive and reinstall Chameleon or Chimera to the default location on the same drive, then use Disk Utility to erase the EFI partition (you will have to mount it first). This will not work for RAID or Fusion Drive systems. You could also try using EFI Mounter which is available in the Community Downloads sections of this site, This utility ensures that the EFI partition is mounted once OSX is booted which should allow FileNVRAM to function normally.
3. In addition to having a unique OSX S/N (see Step-3) you must also have a unique OSX platform UUID, this is anther unique system identity and is normally generated by OSX via a key passed from the BIOS called 'SystemID'.
In April 2014, Apple implemented new checks on their severs to make sure all iMessage packets are authenticated, these new checks ultimately led to the discovery of the "SId Bug" in the BIOS of some motherboard's which can cause a hackingtosh to have an invalid or duplicated platform UUID because 'SystemId' is not initialised correctly.
Since FileNVRAM also needs to use the value of 'SystemId' it is important to make sure your BIOS does not suffer from the 'SId Bug' so now is a good time to jump over to Part-2 of the guide and check to see if your BIOS is effected by it and apply the fix if necessary.
4. The version of FileNVRam.dynib included in the modules attachment of this guide is V1.1.2 this version is recommend for all Chimera Versions up-to 2.2.1. If you are using Chimera Version 3.0 or later then TonyMacx86 recommends that you use version 1.1.3 of FileNVRAM which you can download directly from this link, download and unzip the archive, you only need the file called 'FileNVRAM.dylib' copy and paste it in the /Extra/modules folder, delete the old version first if already there - alternatively download the attached archive which contains both version of FileNVRAM and replace your exsisting version with the correct one.
A small number of users have encountered issues with Chimera Version 3+ and have either stuck with FileNVRAM V1.1.2 or backed out Chimera to version 2.2.1 and FileNVRAM V1.1.2 this seems to effect some users running OSX 10.8 x (Mountain Lion). If your running Mavericks then use the latest versions of Chimera and FileNVRAM.
Please note that if you have recently updated to Chimera V3.0 or later and are injecting 'SystemId' in order to negate the SId bug then you must use the SMBIOS injection method, please see Part-2 (Step-7, Path B) for more info if you have not already done this.
Step-5 Summary: If using Chimera or Chameleon you must have FileNVRAM installed in /Extra/modules.
Step-5d: NVRAM - MLB & ROM Values
Two crtical values stored in NVRAM that iMessage uses when registering on Apples servers are the MLB (Mac Logic Board) and ROM data values. Chameleon and Chimera users can view the NVRAM values using the terminal command 'NVRAM -x -p' which will display the values encoded in base64, you can use an on-line base64 converter to convert the <data> values to hexadecimal values, i use this one:-
Which can convert in both directions ...
A easer way to check these values is to use the attached utility 'iMessage Debug' which should work for all boot-loaders including Clover.
To use iMessage Debug download the attachment at the end of Part-1 and extract, there is no install required, simply double click on it in Finder to run it. It will dump all of the critical iMessage values from the NVRAM Cache including Platform UUID, S/N .. etc in a readable form.
The MLB and ROM values will be prefixed by a UUID and will look something like this:-
If the values (xxx..) following these prefixes are incorrect, such as all zeros or blank then iMessage will have issues. Note that the UUID prefix should not and must not be the same as SM-UUID or Hardware (Platform) UUID - in most cases it will be the same as above which is ok.
The MLB Value Should be 17 digits in length and made up of alpha-numeric characters.
The ROM value Should be 6 Bytes long (12 hexadecimal digits)
In addition to having valid values for MLB and ROM it is vital that these values are also persistent between shutdowns and reboots, as already discussed in the guide if these NVRAM values are not maintained either by Clover or FileNVRAM then the boot-loader will generate new random values on each boot.
Whilst iMessage will continue to work for a while, Apples servers will detect the change in these values and either cause authentication/login issues or be identified as a different device on your network, if it happens too often then it may cause a IP/Device lockout to be placed on your AppleID. This is a part of Apples backend security checks to stop hackers from cloning OSX system identities either for sending spam or gaining access to iCloud data.
Checking for persistent nvram values is easy, simply run iMessage Debug and make a note of the MLB and ROM values or take a screen dump of the iMessage Debug window then shutdown the computer.
Power back up and re-run iMessage Debug, if your boot-loader (and FileNVRAM) are working correctly then the MLB and ROM values will be the same as before.
If you have invalid MLB and/or ROM values (all zeros, blank, invalid syntax) or the values are changing on each boot-up then you must address this issue before going any further, whist working on these types of issues I recommend keeping disconnected from all of Apple iCloud services (logout from iMessage, iCloud .. etc) do not try to login until your happy that everything is correct.
If your running Clover then skip down to the section titled 'Manual Injection'
If you using Chimera or Chameleon as your boot-loader then check these things first :-
- There is a new version of Chimera - Version 4.0 you may want to try this first if using Chimera, although there is no mention of better support for FileNVRAM in the change log.
- There have been reports that UEFI can cause problems on some systems, if you have the option available and are not running Windows 8 in UEFI mode then disable all UEFI options in the BIOS and use legacy boot options (SATA-P0 .. etc)
- Chimera and Chameleon can have issues with FileNVRAM if too many 'dylib' files are in the modules folder, try removing some or all of the other dylib files and see if that helps.
- It has also been reported that ACPICodec.dylib will cause problems with FileNVRAM, if it exists in your modules folder - remove it.
- Ensure that all files in the modules folder are .dylib files, if any other files are in the modules folder remove them, it has been reported that some versions of the boot-loader will try to load any file as a module even if it does not have a .dylib suffix, which could abort the SMBIOS/NVRAM initialisation process.
- Try updating your BIOS, whist not directly related to MLB and ROM values it has been found to help some users, I suspect that it allows better SMBIOS generation, however if your using a custom/patched DSDT you may need to rebuild it using a new native DSDT as the source.
- If you are running a version of OSX earlier than OSX 10.9.x then consider updating to Mavericks - there have been a few reports that some users were not able to get the MLB and ROM values persistent until they updated to Mavericks, this is not something I can not confirm as i've not personally experienced it.
Manual Injection of MLB & ROM values
Important: You will find many posts (even this thread) on this and other forums quoting real Apple Mac MLB and ROM values (and OSX S/N) that are supposed to work. I strongly advise against using these shared/leeched values. Apple is getting more wise to cloned id's and you may find that by using such values you will loose the ability to associate other Apple devices with your AppleID and you may even be locked out of your account if too many people use the same MLB and/or ROM values. By using someone else's MLB and ROM values you are effectively cloning/spoofing that persons system on Apples iMessage servers which can't be good for them or for you from a security point of view - Please see step 5f "Using Leached ID Values" for more information.
With that said and out of the way, many users have had good success re-activating iMessage by manually injecting new unique and correctly formatted MLB and ROM values:-
For the MLB value use your OSX S/N + random alpha/numeric values to make 17 digits long.
The ROM value is a heated discussion on many OSX Hackingtosh forums, some people think on a real Mac it is the MAC address of the firewire port, others believe that iMessage will only work if it is a cloned value form a real Apple Mac. The truth is that it has to be unique and 6 bytes long (12 Hexadecimal numbers), since a Network MAC address is 6 bytes and unique its a good value to use.
An easy to get a MAC address is to open 'System Preferences', click on 'Network' and select a Ethernet port (any will do) from the list of available network devices. Now click on the 'Advanced' button and then select the 'Hardware' tab, make a note of the MAC address, it will be 6 bytes ( 6 x 2 Hexadecimal numbers) each separated by a colon, do not include the colon when injecting a MAC address as a ROM value - you just need the hex numbers.
Method for Chameleon & Chimera Users:
To inject new nvram values open terminal and use the following commands :-In each case, replace 'xxxxx' with the appropriate value and be sure to always use the same prefix UUID as displayed via iMessage Debug (normally 4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14)Code:sudo nvram 4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:MLB=xxxxxxxxxxx sudo nvram 4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:ROM=xxxxxxxxx
When injecting the ROM value place a '%' in front of each byte
Ethernet MAC address = 23:f4:e7:65:4a:44
To inject it as a ROM value execute:Important: FileNVRAM must be installed and working correctly in order for OSX to remember the new MLB and ROM values after a power down or reboot (Chimera & Chameleon only)Code:sudo nvram 4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:ROM=%23%f4%e7%65%4a%44
After changing the MLB and/or ROM values, run iMessage Debug again and check the change, then reboot the computer and run iMessage Debug again, ensure the the new values are persistent, if they are then try a few more reboots/power downs ..etc, if all still looks good then jump down to the next step (5e)
If they keep changing then your last option is to try different versions of FileNVRAM and/or Chimera/Chameleon. If your using Chimera try switching to Chameleon.
I recommend using Chameleon Wizard version 4.4.1 or later to install different versions of Chameleon - on the 'Install page' use the drop down to select the Chameleon version you want to try and set the install method to 'Update' ensure you check the box 'Install more boot-loader files' then click on the 'Install' button. Thats - it. You can easily switch between different versions of Chameleon using this method, to switch back to Chimera run the appropriate standalone installer. Some of your boot options may need adjustment to get optimum performance and full GPU support.
If after trying all of the above you find that your MLB & ROM values are still changing on each boot AND your motherboard's BIOS suffers from the SId bug (See Part-2 of the guide) then your very likely to find yourself in a rather frustrating situation. Due to version incompatibilities with the SMBIOS memory table between Chameleon (Chimera) and FileNVRAM you may find that you can not solve both of these issues at the same time.
If you don't know if your motherboard suffers from the Sid bug then stop and read Part-2 of the guide now, check to see your BIOS has it, if it's OK and is not suffering from the Sid bug then carry on trying different versions of Chameleon you have a fair chance of finding a combination that will work.
However, if your BIOS does have the SId bug and a BIOS update does not help, then I seriously suggest you consider switching to Clover as your boot-loader right now, you could save yourself a lot of time and frustration. If you've been thinking about taking a look at Clover then do it now. Whilst it is possible to resolve both of these issues without using Clover I would say that you now have a 30% (or less) chance of it working (depending mostly on hardware).
Don't be afraid to learn something new, it really is worth the effort and once you've got it working resolving any SMBIOS/NVRAM Injection issues is straightforward and you'll kick your-self for not doing it sooner. I consider Clover the future for OSX hackingtosh systems especially with OSX 10.10 on the near horizon. Personally I find it easer to install OSX using unibeast and then Install Clover as the boot-Loader (see Post #1272 for more info)
Method for CLOVER Users:
The latest version of Clover (r2953) works well for OS X 9.5X and 10.10 for novice Clover users I recommend using Rt Variables method of injection as its a bit easer to understand, however you should be aware that Clover is changing the way it injects MLB & ROM in the future (See Update below).
I also recommend that you use Clover Configurator for maintaing Clover's config.plist which you can download from here, for mounting the EFI partition i use a OSX menu utility called Semulov which can be download for free from the developers web site here.
Mount your EFI Partition, run Clover Configurator, and load the config.plist from the /EFI/Clover folder, click on 'Rt Variables' on the left selection plane and enter the values for MLB and ROM (hex numbers only as detailed above) in the appropriate fields.
Clover Update October 2014:Code:<key>RtVariables</key> <dict> <key>MLB</key> <string>XXXXXXXXXX</string> <key>ROM</key> <data>YYYYYYYYYYY</data> </dict>
Important: As of Oct 2014 the Clover developers are making the Rt Variables method of injecting MLB & ROM values deprecated, however if your already using the above Rt Variables method to inject the MLB & ROM values then there is no need to panic or change anything right now as this method will still work ... for the moment. It's possible that it may stop working with a future release of Clover should the developers remove the code from the sources.
The official (new) method of injecting/specifying the ROM & MLB values for Clover is as follows:
ROM: This will now be read from the last 6 bytes of the 'SmUUID' field. If you have nothing in the SmUUID field then Clover will try to use your BIOS's SystemId (see Part-2 of the guide) however, I personally think it's always best to override The BIOS (even if it does not suffer from the SId bug) and to use the terminal command 'uuidgen' to generate a new random value (See Part-2, Step 7, Path-C). Enter the generated UUID as the SmUUID value on the SMBIOS page. If this is a new OSX Install then you can leave it like that. If you want to keep you old ROM value then replace the last 6 bytes of SmUUID with the ROM value you were using before which is normally the MAC address of an ethernet port (usually en0).
Note: It is important to understand that configuring Clover like this will cause your existing Hardware (Platform) UUID to change (if it's an existing install). Whilst this in-it's-self is not a problem it will change the identity of your system from your previous install which in-turn may cause some user profile settings to be changed due to the Hardware (Platform) UUID being used as a key value for storing critical OSX configuration against.
MLB: This is now read from the 'Board Serial Number' field on the SMBIOS page, on a clean Clover install this is defaulted to Clovers own set value which is now black-listed on Apples systems. You therefore must replace this with your existing MLB value (on an existing install) or use your OSX S/N + Random Alpha / Numeric digits to make it up to 17 digits.
iMessage Debug not Working: There are quite a few versions of iMessage Debug floating around on GitHub. Since it is a terminal framework utility the version attached to this guide may not work on versions of OSX older than Mavericks or ML, if it does not work for you try finding an alternate version or downloading a source file and compile it on your own system or you can use Darwin Dumper as an alternative.
Credits: iMessage Debug was originally created by @ElNono based on the iMessage login research done by @tflux back in September 2013 a big thank you goes out to those guys.
Step-5e: NVRAM - Plist Reset / Rebuild (Chimera & Chameleon)
Sometimes the key data stored within FileNVRAM's plist can get out of sync, for instance if you change your OSX S/N the MLB value in NVRAM may not match the new one. There are multiple reasons for resetting FileNVRAM plist.
I recommend resetting the NVRAM plist when ever you change anything to do with the system identities (UUID, S/N, System Type .. etc) or after using step 4 of the guide. I tend to do this all the time when working on fixing iMessage.
Because FileNVRAM's job is to keep the nvram.uuid.plist in /Extra updated at all-times - on some systems the file can be recreated during a OSX shutdown in which case it may not pick up changes to certain SMBIOS parameters. So we need to temporally disable FileNVRAM - this updated fail-safe method will ensure that you always get an entirely new uuid.nvram.plist.
- Disconnect from Internet
- Copy FileNVRAM.dylib from /Extra/modules to your Desktop
- Remove FileNVRAM.dylib from the /Extra/modules
- Remove all nvram.uuid.plist's and empty the Trash
- Ensure that there are no nvram.uuid.plist's in /Extra.
- Make any necessary changes to SMBIOS
- Copy FileNVRAM.dynlib from your Desktop back to /Extra/modules
- Open a terminal window and execute the following command:-This console command clears the value of the 'boot-args' key stored in the OSX NVRAM cache which can sometimes interfere with creating a new 'nvram.uuid.plist' file in /Extra if set.Code:sudo nvram boot-args=""
- Check that a new nvram.uuid.plist has been recreated in /Extra
- Check uuid in filename matches (IORegistry: IODeviceTree : efi / platform / system-id)
- Check MLB & ROM using iMessage Debug
- You may have to re-inject your ROM value if so inject it and reboot, check again
- If all looks well reconnect to the Internet
Step 5f: NVRAM - Using Leached ID Values (Stolen Identity)
There have been several posts in this thread about using leached 'Real MAC' ID's rather than using random, unique values. Whilst this method is known to work and several forum members are using this method, unless you own the MAC who's ID's you are going to clone, then I strongly recommend that everyone else avoid this method. When the device is registered with Apple the ID's are used to create an iMessage 'authentication token' which is then used to secure all iMessage traffic between your device and Apple.
If you use the 'Stolen Identity' method then your iMessage data is essentially using the same authentication token as the machine who's ID's you've cloned/stolen. Even if you change the ID's after registering with iCloud, the iMessage authentication token remains in place until you logout. Thats why if you get logged out and your ID's have changed (such as MLB or ROM) then the token can no longer be authenticated.
Since it's relatively easy to intercept IP packets (especially on non-secure wifi) it's a security hole that could potently be used to decode someone else's iMessage packets.
My main concern is that if too many users do this using leached ID's then Apple will be forced to change the whole iMessage protocol which could be a real problem for us hackingtosh users who want to use iMessage, it could potently lock us all out of iMessage for good which would be a real shame.
I understand why some of you are getting frustrated and resorting to this method, but i think it can only end badly for everyone if it becomes a common practice.
As already mentioned, for some of you this will mean ditching the familiarity of Chameleon/Chimera and moving over to Clover which may seem daunting especially for novices but it really is not and once you have got your head around it you'll wonder why you didn't do it sooner. It really is the future for hackingtosh systems.
Please don't resort to using hackers methods, as it will give this community a bad name and could make things very difficult for all of us in the future. My personal feeling is that Apple are actually ok with people using OSX on their PC's. After all the OS is free .... surely it would be better for Apple if PC users dropped Windows in favour of OSX ? .... leading to increased awareness of Apple eco systems and features ... it could even be considered clever marketing by Apple .... it's advertising that money cant buy (literally for a lot of us) .... I know if i could afford one my next computer would be a MAC, however if the hackingtosh community abuse this oversight then we should not be surprised if Apple do something about it, especially when it concerns the on-line security of their customers.
Step-6: Time to Try iMessage
After applying any of the steps from Part-1 and/or Part-2 of the guide, and before trying iMessage I would recommend running Disk Utility and repair permissions on your startup disk, this is optional but a worth while step.
Now reboot your system ....
If you installed or updated Chameleon (or Chimera) then its best to pause the boot process the first time round and check that you have the correct version installed, press the <Tab> key to switch to text mode while still in the boot-loader, the version will be displayed at the top, it needs to be 2.2 or later.
If all is well, let OSX load ...
Once booted, open Finder and check that 'nvram.uuid.plist' has been created in /Extra, if not then something is wrong with your install, recheck everything.
If nvram.uuid.plist is present in /Extra and it has a valid 'SystemId' for 'UUID' in the filename (as detailed in Part-2 ) then its time to give iMessage a go, hopefully it will now work.
If things don't work the first time do not give up, sometimes you may need to repeat a step or perform a step that you skipped the first time round, be sure to read all of the notes.
Observations and Credit
I've successfully used all of the above steps in various combinations to get iMessage working on OSX Mountain Lion 10.8.4/5 and Mavericks 10.9.0/1/2/3 on a multitude of hackingtosh systems. Please post your success or fail stories to this thread and if it did work for you please click on the 'Recommended' tab at the very top of this post to help others find it.
Special thanks to xzenue for creating the FileNVRAM fix.
Further notes for RAID Users
As detailed at the start of Part-1, if you boot OSX from a software raid then unfortunately it causes a problem for FileNVRAM. Because the boot loader has to be accessible outside of OSX (a software raid can only work once the kernel is up and running) the boot-loader and /Extra folder must reside on the raid helper partition(s), unfortunately the raid helper partition(s) are unmounted once OSX starts up, thus FileNVRAM is unable to access the /Extra folder which means that the contents of nvram.uuid.plist can not be updated.
You can use the RAID clone method detailed at the start of the guide to get iMessage working initially but if you ever get logged out of iMessage for any reason then you will need to repeat the clone procedure so that the NVRAM cache, nvram.uuid.plist and the iMessage plists can get updated with new keys and data.
Once you have re-cloned the volume back to your raid you need to copy the new nvram.uuid.plist to the /Extra folder on both the raid helper partitions (be sure to delete the old ones first), it is not necessary to blow away the raid on a re-clone but copying the nvram plist on its own will not work, you have to clone the whole drive back to the raid as-well.
I'm sure that there must be a better way like updating some OSX configuration files with keys or UUID's, but as yet i have not found one, if anybody else finds a better solution to resolve the raid issue with FileNVRAM please post.. I have a RAID 0 on my primary OSX development system and come against this problem from time to time.
Update: I have reported this issue to the developers of FileNVRAM and suggested a possible work around, once we have a better solution for Raid users I will update the guide. Please see this Link for the problem & enhancement request.
In order or for iMessage to work on a Hackingtosh computer the following must all be true.
- You should have a valid credit card registered against your Apple ID - See Step 1.
- Your AppleID must have a verified status - See Step 1.
- NIC BSD names should start at en0 and be sequentially named with no gaps - See Step 2.
- NIC being used to access the Internet must have a 'Built-in' status - See Step 2.
- You must have a unique OSX S/N and up to date boot-loader - See Step 3.
- The first 2 digits of the S/N must match the the System Type ID - See Step-3.
- You should have the correct version of FileNVRAM.dylib in '/Extra/modules' - See Step - 5.
Help - It Still Doesn't Work ?
Whilst this guide should work for the majority of you there are a few more odd situations that can still cause iMessages to fail. First if you haven't already done so, you should read through Part-2 of the guide below and check that you have a unique BIOS SystemId and OSX platform UUID, make sure your not effected by the SId Bug.
Although rare, some issues such as the ROM value always returning zero's have been resolved by updating the BIOS. Whilst updating the BIOS has never resolved anything for me it has helped a few people on this thread/forum so it's worth considering if your continuously having problems and the fixes don't seem to work.
Warning: You should only update the BIOS if you know sure about what your doing .... if you are using a DSDT with your boot-loader then updating the BIOS may break your DSDT's system compatibility. Idealy after updating the BIOS you should extract a native DSDT and re-patch.
Sometimes it is necessary to try some of the steps in the guide more than once, iMessage is very very fussy, so much so that sometimes the order of the things you do can effect the out come, the order given is the guide is a logical one for a system that has just had OSX installed with no prior knowledge of iMessage fixes.
There is a basic set of requirements (see Part-1 Summary above) that must be met for iMessage to work on a Hackingtosh, if these requirements are met then iMessage should work. Thats why I've tried to write this guide as a tool box of procedures (steps) for you to use in resolving iMessage issues, just about everyone will have a different set of issues requiring the use of different 'tools', no one step can cover all the issues.
If you understand the problems then you learn and can give feedback which helps everyone.
iMessage can be very frustrating and can take a lot of time to fix, there are countless tips on hundreds of forum sites all over the internet, some are useful, some are not, many just tell you to do something without any real understanding of what the issue is and thats not good for the community...blind leading the blind.
If you continue to have issues, try searching this thread - its possible that someone has already found a solution to your issue, one suggestion that keeps coming up is to use a real MAC to reinitialise the effected AppleID, although I can not personally confirm this suggestion, it does seem to have helped others but like so many tips out there it could also be coincidence as this also works when using another Hackingtosh to reinitialise an AppleID as discussed in Step-1.
Finally I'll end this part of the guide by stating that Apple are constantly evolving and updating their on-line eco and message systems with new features and security measures, as such do not be surprised if we see new and even stranger issues with iMessage in the future. If you think you've encountered a new iMessage issue please post to this thread with as much info as you can, including screen shots of any alerts and/or console log snippets and i'll try to help.
Thanks for reading & good luck.