I am migrating several users from a 2009 iMac running Lion to a 2014 iMac w/fusion drive running Mavericks with FCPX and the software runs in every profile except the one I auto-login to every day. This is a lab machine and I have re-installed, fixed permissions, deleted several plist files, run it in all other user profiles (they all work) checked to make sure everything is updated. Watched activity monitor, checked logs (no specific error code I can share). I even created a new profile and it works there? Any other suggestions?