There are a couple of ways to record the screen of your Mac computer. You can use the Screenshot Toolbar, QuickTime, or a third-party app.

QuickTime player is one of the easier and fastest ways to record your computer screen. For simple screen recording, open the QuickTime player on your computer. Go to File and choose screen recording.

To mirror your iPhone's screen to a Mac computer, you can use QuickTime or AirPlay. Here's how to do both.