Hello,
imessage won't allow me to log in, the user name and password are accurate, it started before i updated from mountain lion to yosemitie but the problem still persists after upgrade.
MacBook Air, OS X Mountain Lion (10.8.2)
Posted on Dec 24, 2014 11:51 AM
Q: imessage won't allow me to log in
FaceTime, Game Center, Messages: Troubleshooting sign in issues - Apple Support