I have 2 imacs, 3 iphones, and 2 iPads in the house. Messages on one of the iMacs will not allow me to log in. It was working until a few months ago. I am get the following. "Cannot sign into iMessage, an error occurred during activation."
iMac, OS X Yosemite (10.10.2)
Posted on Feb 27, 2015 9:23 AM