Way 3: Update Or Reinstall The QuickTime Player

Since the problem is with the QuickTime player so, very first, you need to close… Complete StepsĪnother simplest way which you can try to troubleshoot the QuickTime player… Complete Steps How To Fix QuickTime Player Can’t Open MP4 On Mac?įollow the below guide to learn how to easily solve the file isn’t compatible with QuickTime player MP4 file and won’t open issue. If so, just scroll down this webpage and get your answer in the next section. Now, you must be worried to know how to fix QuickTime player can’t open MP4 Mac. So, these are the major factors behind unplayable MP4 video on QuickTime player. The MP4 video that you need to open & play is corrupt.When your Mac PC is infected by the viruses or malware.QuickTime Media Player is damaged/corrupted.

Thus, below we have listed the common causes: There are many reasons that can lead to MP4 QuickTime not working. But, before we dig into the fixes, it’s important to know why QuickTime Player can’t open MP4 Mac.

Cannot play mp4 on mac