I have encountered a new issue that may be some changes on apple's end. I'm on 10.10.1 and messages has been working flawlessly. I'm using the MLB and ROM from my macbook air for months. Today messages stopped working properly. any messages sent from osx messages says delivered but is not actually delivered.
@packrobottom,
You're not alone ..... it would seem that Apple have implemented yet another update to the iMessage validation protocols that seems to effect systems using real (cloned) MLB & ROM values. This new issue started sometime between the 28th and 29th of December 2014 depending upon location.
I'm not entirely sure what is causing the new issue ..... it's possible that Apple are now black-listing devices that are using cloned ID's or Apple may have implemented a new cross check to the System Type and/or anther system identifier such as SmUUID ... something i've been speculating since Apple introduced tighter SmUUID (or Hardware UUID) validation last year.
Symptoms of this latest issue seem to be no messages being sent or received from OSX devices despite being able to log in and out of iMessage without issues, mobile devices such as iPhone and iPad are unaffected.
I think this issue is only effecting OSX systems that are using the same MLB & ROM values
and are logged in to iMessage at the same time, this is my best guess as to what may be going on until proven otherwise.
One can only assume at this stage that Apple have responded to the recent increase in people using cloned MLB & ROM values since the 17th of November MLB validation changes .... I guess the desire to get iMessage working no matter the cost by some people has forced Apples hand. It's not effecting everybody at the moment, but like all recent changes to iMessage validation it may take a few days or even weeks for the change to effect everyone it is targeted at.
I'll try and dig a little deeper over the next few days but until then ..... to those of you using cloned values, if they are from a Mac your own, you should seriously think about this recent escalation,
if you can live without iMessage then i would strongly suggest that you switch to using locally generated and unique MLB & ROM values ASAP (use the guide - Part-1, Step 5d) whist this of course will stop iMessage working it should hopefully stop your ID's being black-listed or flagged by Apple.
This latest issue is also effecting iMessage on some real Mac's who's ID's have been used on hackingtosh systems so it may well be a MLB/ROM black-list, early reports from users who have contacted Apple about the issue indicate that restoring iMessage functionality on Apple hardware can be hit and miss ...
Once i know more i'll update the news on the main guide.
Cheers
Jay
(Above info added to main guide 31/12/2014)