I am working on a mac with a iCloud preference pane issue. The iCloud account that shows up does not exist. it has somehow replaced an email address with @mac.com as the user id. I checked on iCloud and this email address does not exist. I try to logout and it hangs, since the account does not exist. I would like to enter the real Apple ID, but cannot. I have deleted everything from the Internet Accounts preference pane, but that does not help. Is there a seperate preference pane preferences file just for the iCloud preference pane that I can manually delete? I could then setup the correct Apple ID. Thanks.