Can't sign in on iMessage and FaceTime after upgrading to ML

try this:

go to settings --> accounts and make sure that your xxxx@me.com account is activate. I haved after the ml update a second account (me.com).

now messages works pretty fine.

I'm having similar problems. All other app that use my Apple ID work fine but Messages refuses to login with my account.

I have the same problem: everything works fine unless Messages and Facetime. Although I do I have a me.com account that I use as Apple ID, but say that does not work.

what settings???

I have the same problem, did everythings from restarting comp to restarting all home appliances... 🙂 it just wont sign in... any sugestioons???

Hi all, this solution has worked for me, I describe step by step and please forgive my English:

- Open FaceTime, attempts a connection and leave the window in the error message, but do not close the program.

- Open messages, open Preferences and try to connect iMessage account with your Apple ID. If you still have the error, leave the window open showing that error.

- Open Activity Monitor (Spotlight will help you find it). Using the filters you select "All Processes" and in the search field locates the process "imagent". Kill this process. It will restart again almost immediately.

- Now go back and try again FaceTime the connection with your Apple ID. Wait until the identity is validated, you can take a while.

- And finally do the same with IMessage account, using the same Apple ID you used in Facetime.

Good luck!

hey thanks it really works!

Thx Man U got the right solution to fix it, on my case it work so fine

Hi Superse, if it was not a good solution for you, try to make a safe start. I have read that some people it has worked.

Fantastic, it worked for me, Thanks

it didn't work for me. instead, it created more problem.

inexplicably, now i have duplicate inactive imessage account which i don't know how to remove!

instead of looking for ways to activate the imessage & factime, now need to fix another thing...

another thing which i tried reading the thread was to log in using safe mode. it didn't help either. same "The server encountered an error processing registration. Please try again later." problem. it was too laggy and had to force a shut down. rechecked disk permission and found a host of permission problems.

sigh...

more problems....

apple support is closed for holiday...