Are you signed into iCloud in System Preferences/iCloud?
Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library. Move the following to the Trash and restart.
Close all running apps. Put the following items in the trash:
1) In the ~/Library/ folder, put the Caches folder in the trash.
2) In the ~/Library/Application Support/ folder, put the folder iCloud in the trash.
3) In the ~/Library/Preferences/ folder, put the file MobileMeAccounts.plist in the trash.
Learned fromKurt Lang