I am so sick and tired of Apple's complete inability to keep iMessage and Apple ID operating that I want to shit myself until I vomit.
As I reported A FUCKING YEAR AGO, Apple has some serious problems when it comes to using your Apple ID for iMessaging with Mountain Lion. Seemingly at random everything will go to shit for no discernible reason, and the you can't ever get things working again without a call to Apple. And, odds are, you'll be on the phone forever because even though they are aware of the problem, they're not really doing anything about it...
And that's just the tip of the iceberg, of course. Mac OS X has a printing system that has been garbage since day one... AND IT NEVER GETS ANY BETTER. I still have printers randomly drop off the face of the network, just as I've had for a decade. I still have to delete printers, reset the printing system, and restart my Mac over and over and over and over and over and over and over and over again because I can't print... even though I was printing just fine an hour ago.
And don't get me started on not being able to have a persisten menu bar in full-screen apps. That idiocy drives me bat-shit insane on a daily basis.
And what about Mail not being able to send Windows-friendly attachments that are actually Windows-friendly attachments?
And what about...
I know that most of Apple's focus is on the while iPhone/iPad universe because it's just so damn profitable... but holy shit... there are problems which have been hanging around OS X FOR FUCKING YEARS! When will Apple just bite the fucking bullet, commit the resources, AND GET THEM FIXED?!?
My guess? Never.
They are so far past giving a shit now that I'm shocked they even bother at all.
And I anticipate Mac OS X "Mavericks" won't be much better.
I guess somebody had to take Microsoft's place in the shit service and crap development department.
I just never thought it would be Apple.
UPDATE: After many, many attempts at solving my iMessage problem, I logged out and back in to iCloud for the millionth time and ended up getting a new message: "The registering device does not have appropriate credentials." Googling this actually gave me a solution... blocking all local storage for the Flash plugin (in the System Preferences under the Apple Menu)...
And... lo and behold... it works. I can log in to iMessage again. Still no clue why it randomly stopped working on both of my Macs at the same time (was it a Flash update?)... but here it is.