mac set VLC as default software for video playback of mp4 files

Select the video file you want to play, such as mp4 format

Right click, click Get Info

Click View Open with to expand the options

Select the default software to open the current file

The current QuickTime Player cannot be opened, so select the open source VLC player

Then just click Change All

At this point, double-clicking on the video file opens it in the VLC player by default

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