Navigate to "File" in the upper left corner and select the "New Movie Recording" option.
Connect your iPhone to your Mac with a USB cable.
How to mirror iPhone to Mac with USB via QuickTime Player: To mirror iPhone screen to Mac using QuickTime Player, you need to prepare a USB cable, make sure your operating system is macOS X Yosemite or newer, and your iPhone is running iOS 8 or newer. Not only is it a media player, but it can also record video and audio using the hidden feature of Screen Mirroring. QuickTime Player is a built-in feature of the Mac. Way 1: Mirror iPhone to Mac with QuickTime Player
Way 6: Show iPhone Screen on Mac with ApowerMirror.
Way 5: View iPhone Screen on Mac with LetsView.
Way 4: Screen Mirror from iPhone to Mac with AirPlay.
Way 3: Mirror iPhone Screen on Mac with Reflector.
Way 2: Share iPhone Screen on Mac with AirServer.
Way 1: Mirror iPhone to Mac with QuickTime Player.