If built-in options aren't enough, these well-regarded programs provide more robust features:

: Provides a beginner-friendly online converter that also lets you trim and edit the video before downloading the final MP4. Advanced Features for Video Converters

: You can often simply change the file extension from .mov to .mp4 if the video uses the H.264 codec. For more control, use the pre-installed iMovie to export the file as an MP4.

: Open the file with the built-in Photos app , select the Trim tool, make a tiny adjustment, and then choose "Save as copy." This often allows you to save the new version as an MP4. Recommended Free Tools

: Beyond playing videos, VLC has a "Convert/Save" feature that can repackage MOV files into MP4 format.