應該有人跟我遇到一樣的麻煩了吧!https://discussionschinese.apple.com/thread/58635https://discussions.apple.com/thread/7006782
1. Move all files from /Library/QuickTime/ to a temp older on desktop2. Open AppStore and download/install update3. Reboot4. Copy any missing files from temp folder on desktop to /Library/QuickTime.