I just received my new 5K 27" iMac and after restoring from my time machine back up from my old iMac I was greeted by the log in screen, entering my password brings up the following message, You are unable to log in to the user account "ZivaD" at this time. Logging in to the account failed because an error occurred. I called Apple support and they had no idea, I tried deleting the account and re-migrating but still nothing, Apple support seemed to think that the old Mac had the file vault activated and that it was causing the problems, I've checked and its not on. I deleted my whole time machine back up and started a fresh one which took all day near enough, then attempted it again but I still get the same error. The old iMac is a 2011 model and is up to date with 10.11.2 New mac is fresh out of the box and in the following spec. 4.0GHz quad-core Intel Core i7, Turbo Boost up to 4.2GHz 32GB 1867MHz DDR3 SDRAM - four 8GB 3TB Fusion Drive AMD Radeon R9 M395X with 4GB video memory Does anyone know how to fix this? I've never had or heard of this issue in over 15 years of Mac use and Apple support seemed to have no clue either, googling it leads nowhere.