Updated Apple ID but still shows old email address in iCloud settings on Mac
I have updated my Apple ID with a new email address, I did this on the appleid website and everything updated correctly. However, in the iCloud section in System Preferences on my Mac, it still shows my old email address for my Apple ID. I have tried to sign out as per other people's suggestions, but it won't let me as it keeps saying the keychain service is still connected. I have turned Keychain off on all my devices linked to my Apple ID, but it still won't let me sign out. Does anyone know what else I can do so that my Apple ID shows as my new email address??
MacBook Pro, iOS 8.4.1, null