Catalina won't support .mp4 files.

Files will play if they're in an e-mail. But if I download them to the desktop and try to open them, it opens Any Video Converter Lite and tells me "1 Failed to add file. failed files: (name of file)."

What's the solution to this problem?

Posted on Jun 4, 2020 1:57 PM

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3 replies

Kurt Lang

Level 9

71,023 points

Jun 4, 2020 2:01 PM in response to Robert Golden1

Right click on any .mp4 file and choose Get Info. Change the app that opens it to QuickTime Player. Click the button to Change All.

Jun 4, 2020 2:33 PM in response to Kurt Lang

Thanks

Kurt Lang

Level 9

71,023 points

Jun 4, 2020 2:40 PM in response to Robert Golden1

You're welcome. 🙂

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Catalina won't support .mp4 files.

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