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To remove a device from your account, you need to sign out of all Apple Services you're currently logged into i.e iTunes, App Store, iMessage/F-Time (if logged in). Then in 'System Preferences', -> iCloud you must also sign out and delete all your details i.e Mail, Facebook etc from this p/c (don't worry your details will still be stored in iCloud). When you've completed those steps, log into the Web Base iCloud using your Apple ID and click on settings, you'll see all your Devices currently connected to your account where you have the option to remove unwanted devices. There is also an option in System Preferences to do this on the iCloud tab. Good luck.
this did not work. it still shows up under my devices no matter how many times i delete it. my computer is signed off from all apple services and it still shows up every time i log in to icloud. should i call them and say it's a mistake/glitch on their part and to remove it? or maybe tell them i sold that computer? btw, it is a valid serial number via the https://checkcoverage.apple.com/ website, and i DON'T want to continue having that on my account.
 
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this did not work. it still shows up under my devices no matter how many times i delete it. my computer is signed off from all apple services and it still shows up every time i log in to icloud. should i call them and say it's a mistake/glitch on their part and to remove it? or maybe tell them i sold that computer? btw, it is a valid serial number via the https://checkcoverage.apple.com/ website, and i DON'T want to continue having that on my account.

If I am not mistaken you stated in your post you were using a genuine s/n, if you were using it on a hack you do realise that your action was completely wrong as there is an Apple Mac out there with that s/n unless it was owned by you. Now here is where the confusion lies, you are trying to remove a Genuine Mac belonging to an individual somewhere which is most likely still logged into most or all Apple Services who's s/n was cloned by you. This maybe is causing the problems you are having, at this point you've done the right thing by removing it from your account but will take sometime for it to disappear from iCloud. Maybe the way forward is to create a completely new Apple ID which will remove all your devices then you'll be able to start afresh - Good luck.
 
If I am not mistaken you stated in your post you were using a genuine s/n, if you were using it on a hack you do realise that your action was completely wrong as there is an Apple Mac out there with that s/n unless it was owned by you. Now here is where the confusion lies, you are trying to remove a Genuine Mac belonging to an individual somewhere which is most likely still logged into most or all Apple Services who's s/n was cloned by you. This maybe is causing the problems you are having, at this point you've done the right thing by removing it from your account but will take sometime for it to disappear from iCloud. Maybe the way forward is to create a completely new Apple ID which will remove all your devices then you'll be able to start afresh - Good luck.
i did not intentionally clone a valid serial. i used Clover and randomly generated a number and never went further to verify etc. i forgot to mention that the serial number i dont want DOES NOT show up in the Find My iPhone app, which is very strange. it only appears in the AppleID and iCloud settings and doesn't go away.
 
i did not intentionally clone a valid serial. i used Clover and randomly generated a number and never went further to verify etc. i forgot to mention that the serial number i dont want DOES NOT show up in the Find My iPhone app, which is very strange. it only appears in the AppleID and iCloud settings and doesn't go away.

Ok I understand - In future one should first check the s/n and make sure it comes up as 'Invalid' before registering the hack with your ID in iCloud. If you removed the p/c from your account in iCloud it will take sometime for Apple to remove it from the Servers, even genuine Mac owners has voiced their displeasure at finding deleted, old and discarded devices still registered to their accounts. Apple have reportedly fixed this glitch but in some cases it can take up to a month for these to be removed from the account, just do not login to any Apple services with that s/n as this will abort the removal process.

If you're in a hurry to rid the p/c from your account, you could always ring and say you sold the machine to a 'Second Hand Shop' and would like to have it removed from your account and see if they would oblige your request. Good luck.
 
Ok I understand - In future one should first check the s/n and make sure it comes up as 'Invalid' before registering the hack with your ID in iCloud. If you removed the p/c from your account in iCloud it will take sometime for Apple to remove it from the Servers, even genuine Mac owners has voiced their displeasure at finding deleted, old and discarded devices still registered to their accounts. Apple have reportedly fixed this glitch but in some cases it can take up to a month for these to be removed from the account, just do not login to any Apple services with that s/n as this will abort the removal process.

If you're in a hurry to rid the p/c from your account, you could always ring and say you sold the machine to a 'Second Hand Shop' and would like to have it removed from your account and see if they would oblige your request. Good luck.

thank you for your advice. i will wait some time to see if the serial number i dont want disappears. if not, i will call and see what apple can do. until then, no iMessage etc on my hack. :(
 
thank you for your advice. i will wait some time to see if the serial number i dont want disappears. if not, i will call and see what apple can do. until then, no iMessage etc on my hack. :(

There is nothing stopping you from logging into any of Apple Services as long as you take steps to inject a completely new set of values from the ones you were using previously - ROM, MLB, S/N and SmUUID also its important to do all these steps off line, to be sure just remove the internet cable from the p/c. At this point iMessage/F-Time could prove a little more challenging as there could be a block on your Apple ID to enable you to logon until the block is removed by Apple. Try to match a Mac model as close as possible to your setup, if you're using Clover Configurator shake the 'Magic Wand' at least 10 times to ensure a unique s/n for you hack and then check that its not coming up as genuine but 'Invalid' don't be confused by that, it just means its not on their data base as one of theirs which is ok - Good luck.
 
Hello. I just want to write some of mine observations here. I build several CustoMacs and setup them for Messages following guide. I never had problem with older Apple ID accounts, they always work, but newer Apple IDs, its different story. Some just don't work... i try to add payment method to them, change password, change security... nothing works, just message "If you want to use Messages on this Mac contact Apple". There must be some differences in newer Apple IDs when they try to login to Messages server from CustoMac with serial number which Apple dont have in their databases.
 
Hello. I just want to write some of mine observations here. I build several CustoMacs and setup them for Messages following guide. I never had problem with older Apple ID accounts, they always work, but newer Apple IDs, its different story. Some just don't work... i try to add payment method to them, change password, change security... nothing works, just message "If you want to use Messages on this Mac contact Apple". There must be some differences in newer Apple IDs when they try to login to Messages server from CustoMac with serial number which Apple dont have in their databases.

Yes that seems to be the general consensus concerning new and old Apple ID's, this was discussed sometime back here in the forum, old and established ID's were more likely to be successful in setting up on a hack and logging into iMsg/F-Time. New ID's are more problematic on hacks.
 
This is just me being curious, but does anyone know what those last 5 key/value pairs that iMessageDebug spits out are (The ones marked in red below)?
Imessage-Debug-V2.png
 
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