Quicktime
Q: Quick Time not worki
Quick Time Video not Working
MacBook Air
Posted on Aug 21, 2016 6:40 AM
by macjack,Apple recommended
Mac OS X
Start up in Safe Mode and see if the problem still occurs:
Mac OS X: How to troubleshoot a software issue - Apple Support
Restart holding the "shift" key.
(Expect it to take longer to start this way because it runs a directory check first. Also give it a little time after start because it runs some maintenance routines in the beginning.)
Posted on Aug 21, 2016 6:42 AM