[GUIDE] Clear multiple configuration identities in MacOS


Aug 27, 2011
ASRock-Z97 EX6
i7-4790K OC @ 4.8GHz
Vega 64LC + HD4600
MacBook Air, MacBook Pro
Mobile Phone
Android, iOS
Background Information

MacOS generates a configuration 'key' based on the current SMBIOS identity ID's such as SM type, S/N, MLB, ROM .. etc. This 'key' is used as a 'pointer' to the current configuration that MacOS will use in the file(s) located in :-


Example Preferences.plist :-
If you change your SMBIOS type or any of the critical system ID's such as MLB, ROM, S/N in your clover config.plsit then MacOS will generate a new configuration 'set' and 'key' but will also keep copies of all previous configuration 'sets' in its configuration files if you have an iCloud account then these old configuration 'sets' remain as associated devices with your iCloud account.

As most of us will know its possible to remove old Hackingtosh devices from our iCloud accounts using the online iCloud website and going into setup -> devices, however 'ghost' devices that are identified through multiple configuration 'sets' on the local system do not always show up on the on-line system.

You can easily check to see if your system has multiple 'ghost' configuration identities :-

Open System Preferences, Click on the iCloud icon and then on Account Details, wait for a few seconds and you should see a new dialogue panel open, wait a few seconds and then click on the Devices tab.

You should see a list all of the devices registered with your iCloud account.

If you have changed any of the SMBIOS ID's on existing Hackingtosh builds then it is quite likely that you will see multiple instances of them in this list. In my case I had four versions of my HP Spectre X360 laptop that i've been working on over the last few months.

iCloud Devices.png

Normally we can use this dialogue panel to remove devices associated with our iCloud account by simply selecting a device in the list and then clicking the option 'Remove from Account'. You need to click on each one and compare the System Type and S/N to to you current working build to identify the ghost devices to remove. This works fine for devices that are no longer associated with a live configuration.

However since you are quite likely logged into iCloud on a device that has multiple device configuration 'set's this will not work, if you try you'll see the 'ghost' device removed from the list for a few seconds and then be re-listed again.

Ramifications of Multiple Configuration Identities

Good question, to my knowledge none at the moment, however since genuine Apple Mac systems have all the SMBIOS ID's baked into the motherboard and firmware its unlikely that it would ever happen on a genuine Apple Mac unless the motherboard was replaced, in which case its quite likely that Apple would cleanup the configuration files before returning the system back to the customer.

Its quite feasable that Apple could use the existence of multiple configuration keys to identify Hackingtosh systems in the future if they wanted to. As detailed in my iMessage Guide in the past Apple have used invalid SMBIOS data to block and lockout iMessage users and in some cases iCloud accounts. At the moment Apple seem to be relaxed about the use of Hackingtosh systems with iMessage and iCloud but that could change.

I believe in good house keeping with MacOS and we should do everything we can to keep things as close to a genuine Appel Mac system as possible.

How to clear Multiple Configuration Identities

The procedure to reset MacOS Configuration files is detailed in Section 3.2 of my iMessage Guide what follows is doctored version of that method more applicable to this issue. This procedure is completely safe if followed correctly and you will not loose any data, this method is also recommended by Apple support when genuine Mac's have configuration issues.

1. Using Finder navigate to the root of the OSX/MacOS system drive and then to :-


Note: You may need to use show all files or press <SHIFT><CMD>. to see these folders/files

2. Make a backup copy of the folder :-


Save it somewhere in your user folder such as Documents/Sys-Backup just in case something goes wrong or you need to reference something in your old config files. Most of what is stored in these files is used internally by MacOS and they do not contain much if any user settings.

3. Once you have a backup delete the entire original SystemConfiguration folder in /Library/Preferences/

4. Empty the trash and reboot.

5.. Upon reboot OSX/MacOS will rebuild all of the configuration files, with just one configuration identity.

Note: This will reset a few of your network settings such as last connected WiFi network but the SSID passwords will still be stored on the system. If you have set a custom Computer name that too will be rest to the default.

6. To ensure that you can easily identify the device entry that is using the current active configuration 'set' I recommend that you set a custom computer name, Open System Preferences and click on 'Sharing 'and enter a custom Computer Name, make sure this is different to any that you have used in the past, close Sys Prefs and reboot again.

7. You can now go back to System Preferences -> iCloud -> Account Details -> Devices, if you followed step 6 then you will be able to identify the current active device from the computer name you entered (usually at the top), you can now work your way through the rest of the list and remove any 'ghost' device entries. If you did not perform step 6 then check each 'ghost' entry by clicking on it and very carefully comparing the details against your current SMBIOS values and MacOS version to ensure you only delete the ghost entries and not the active one.

Final Thoughts

If you've been working on getting a Hackingtosh system up and running and have changed either the SMBIOS type or any of the associated critical ID's then its worth checking for ghost devices associated with your iCloud Account. Apple are notorious for closing security holes and with the Mac much of the security revolves around the SMBIOS and its critical ID's.

From a Hackingtosh perspective keeping a clean house will help to ensure that your system continues to work with Apples iCloud and on-line services such as iMessage, as such its worth going through the above procedure once you have a working and stable system.

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Jul 10, 2014
Asus Prime Z370-A
Sapphire Radeon RX 580 8GB
iMac, MacBook Air
Mobile Phone
Android, iOS
Following this guide, my Apple ID device list and the iCloud device list accessed via Apple Device is clean and error free. The very strange thing is, that one wrong/old device is still listed via and I still cant delete it from there. And there, my new Hackintosh is not listed like in the Apple ID list or the iCloud device list via device.

Accessed via original Macbook:

Accessed via Apple ID login (web):

Accessed via iCloud login (web):


The here displaced iMac (Hackintosh) has the wrong/outdated SN and a) not the new SN and b) the wrong device name. Since I face this problem, I have massive issues with the iCloud sync - especially with the calendar - on iOS devices.

UPDATE: After following steps from this post (, now the old and the new Mac device are listed in the iCloud web overview. The device overview accessed through any device (OS/iOS) only shows the current device.


Last edited:
May 2, 2018
ASUS Prime H370M-Plus
UHD 630
Mobile Phone
Hi, I followed the same procedure. But, still my ghost device appears in Account Details of iCloud settings.
Can you guide me?
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