All of sudden iMessage has quit working on my MacBook Air. It was working fine and then the next time I tried to use it on an existing message thread it pops an error that the number is not registered with iMessage. It's that way for ALL message threads. iMessage works fine on iPad, iPhone, iPod.
This site contains user submitted content, comments and opinions and is for informational purposes only.
Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site.