Can't login Apple ID on iCloud and iTunes after updated to MacOS Sierra
The password is correct as I can access in Apple Community now with the same Apple ID. The system requires me input password for both iTunes and iCloud. I tried many times but it always shows like this:
I also have problems on using Gmail account on Mail. I don't know if it is the reason. Or the failure of login Apple ID password caused the failure of Gmail account? Who can help me please!
MacBook Air