SuperSmash First post Posts: 1 Joined: Fri Aug 03, 2012 3:30 am Hello all, There is a known problem that TimeMachine does not work with Mac OSX Mountain Lion. You will get the error oserror2 when trying to backup to your TimeMachine I got the fix: 1. Open a terminal 2. Type in the following line: sudo tmutil setdestination afp://TimeMachine:password@192.168.10.200/TMBackup (Password is your Timema