iMessage cannot login, spinning forever
Recently I'm facing a problem on my macbook pro. My iMessage suddenly failed to log in. The wheel just kept on going for ever. However, if I don't log in, but click on log in later, I can open the chat window and all my old messages are there. If you I go to preference - account, I can see my account but if I click it, nothing came up. SO, there is no way to log out or do what ever.
What I did so far:
1) I followed tutorial found in this forum to clean up iMessage completely. It successfully cleaned up all my messages, but the account problem still exist, and i still get spinning wheel.
2) log out iCloud and the problem still exist.
3)clean up anything related to messages in key train. didn't help anything, account still there.
I'm sure my account is still usable, as i tried on my friend's macbook.
The attachment is a screenshot of the problem.
MacBook Pro, OS X Yosemite (10.10.2)