Messages on my 2014 iMac not working after OS X 10.10 update and iOS 8 GM update...

Messages on my iMac aren't working after the recent updates. Non iOS texts are going to or from my iMac or iPad Air.

"not registered with iMessage"

I've tried a lot of things, logging out/logging in, reboots, etc, and I'm getting the notification on all devices saying they're using iCloud, iMessage and FaceTime.

I posted this on the iOS developer forum. With a couple of glitches, all my iOS 8 beta versions were good. This is the first time a key feature hasn't worked.

Check out the information via the following link. One of the guys whose similar problem was fixed also has a Mac Mini.

https://discussions.apple.com/thread/5844705?tstart=0

I appreciate that, but I think my issue is related to the iOS 8 betas and GM.