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If any updates are available, follow the prompts to update. In QuickTime menu, select QuickTime Player > Update Existing Software. However, you can also find manually if the latest QuickTime updates are available or not. Normally, if the Internet connection is enabled on your Mac and QuickTime Player is open, the app prompts you to download the latest version, if available. If QuickTime player can’t open video files, update it. If this doesn’t help, move to the next method. If MP4 not playing on Mac, close all the applications and restart your computer.
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Let’s get started with the solutions to fix the ‘MP4 file not playing on Mac’ error: 1. How to eliminate MP4 not playing on Mac error?
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While it may be very difficult and tedious to repair MP4 files that are not playing on Mac, you can use some manual and automated tricks to repair damaged videos, as shown in the next section.
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However, there’s always a good chance to repair corrupted MP4 files on Mac, as we’ll see in this post. Often due to improper way of handling videos, file corruption, virus attack, or incomplete video transfer can damage MP4 videos. ‘MP4 files not playing on Mac’ is a common error due to which you cannot play MP4 video files in any media player. Have my MP4 files corrupted? How can I play MP4 video files on Mac? ‘ However, several MP4 files not playing on Mac and threw random errors like ‘cannot open MP4 on Mac.’ I don’t have a backup. Afterward, I transferred the edited files to my Mac and attempted to play them with QuickTime. ‘I had a couple of recorded video clips on my iPhone, which I transferred to a buddy’s Mac to remove unneeded bits with his video editor.
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