Hello! Ive had my macbook pro for a few months now and I haven't been able to sign into iMessage/facetime. When I try to, after putting in my apple id and password the wheel keeps spinning and never stops. Ive tried multiple times and have had no luck. Just today I updated to Yosemite and I still have the same problem! Can anyone help? My apple ID is working completely fine on my iPhone and in the iTunes store!! Thank you so much!