When trying to login you get a message similar to cannot verify login with facetime or messages on osx.
warning: this is quite a complex set of instructions. In the end I ended up creating a new user account on my mac and transferring my documents to the new user
problem: facetime or imessages are telling you it can’t verify, etc
Oh, well. Doesn’t work for me. Neither did checking my time zones, checking for my serial number, resetting my keychain, or standing on my head and counting to 37.