If you do a screen recording on a Mac, you are most likely using the free Quicktime player that comes with Mac OS X. If you are lucky enough to own a Quicktime Pro then you can simply do an Export > Save-As MP4. For those of you that do not have a Quicktime Pro, then you can use this option.
brew install ffmpeg # After installation, you can traverse into the directory where you have the .mov file and run the following ffmpeg -i input-file-name.mov output-file-name.mp4
Not sure what Brew is? It’s the missing package package manager for Mac OS X. Use the following link to learn more: