A software update which was made available by Apple earlier this month causes some users machines to get stuck in a constant update loop. As soon as you install the update it re-appears as available for update. If this affects you, then there is a simple solution.
To install the update once and for all, and prevent it getting stuck in the constant update loop, simply log on to your Mac as a user with administrator privileges, then follow these simple steps:
- Run the Terminal app
- At the command line enter:
sudo rm -R /Library/QuickTime/AppleMXFImport.component
- Enter your password when asked for it.
- Install the update from the Mac App Store one last time.
The update should install properly this time, and should not come back until a genuine future update is available.