How to Check for a Corrupt MP4 File on Mac If not, continue reading for some other solutions. Then check to see if your MP4 file will open now. Once the program is closed, wait a few moments and open it back up.

To restart your app, go to the Quit option from the drop-down menu in the top bar when Quicktime Player is open. The first way to do that is by restarting the program and/or computer and seeing if it resolves the issue. If you’re experiencing issues when opening an MP4 file, it’s a good idea to start with a small fix and work your way up from there. Fix #1: Restart QuickTime and/or Your Mac Unless the file is completely corrupted, you can typically get things fixed pretty quickly. There are also other errors that can occur with software updates. It could be as simple as a small, easy-to-fix glitch or as complicated as a completely corrupt file. There’s no one exact reason why an MP4 file might not open for you in Quicktime Player.

How to Check for a Corrupt MP4 File on Mac.Fix #1: Restart QuickTime and/or Your Mac.

Quicktime player update