Messages on Mac claims all contacts are not register with iMessage
I've been reading through the forms and this seems to be an issue that has stumped people. I thought I would contribute a sparse summary of all the things I have tried. Here is what is happening:
System: Yosemite 10.10.1 on MacBook Air mid-2011
Behavior:
1) iMessage successfully activates on the MacBook Air
2) Almost all (except for usually the first contact tried) returns as "____ is not registered with iMessage"
3) For any old conversations, where the Messages app still believes the user is registered, all messages are not delivered
4) iMessage works on an iPhone without issue
Things I have tried:
1). Turning off iMessage of all devices and then enabling in all possible orders (plus resetting network preferences on iPhone)
2). Checking in Contacts that My Card is properly configured.
3). Resetting NVRAM
4). Deleting relevant keys from Keychain Access and relevant .plist files, etc.
5). Making a second partition and using a fresh version of Yosemite (10.10.1).
6). Making a second partition and using a fresh version of Mavericks (10.9.5).
7). Different Wi-Fi networks.
For all things I have tried, the behavior is the same. What worse, it that his behavior holds for TWO different AppleIDs. Both of these AppleIDs work fine on another machine (a MacBook Pro running Yosemite).
It feels like Apple has blacklisted this MacBook Air for iMessage. Does this happen? The AppleID is currently in debug mode with Apple, so maybe they will figure it out, but it seems like the server just hates with specific MacBook Air.
MacBook Air, OS X Yosemite (10.10.1), null