How can users display their iPhone or iPad screen on a Mac?

Using the QuickTime Player app to record the screen is a practical and effective method for displaying the iPhone or iPad screen on a Mac. When you connect the iOS device to the Mac via USB, QuickTime Player allows you to select the device and display its screen in real time. This feature is particularly valuable for demonstrations, presentations, or troubleshooting, as it can capture both video and audio from the mobile device.

The other options do not serve the same function. For instance, while Apple TV enables screen mirroring, it does not directly connect the iPhone or iPad to a Mac, thus not fitting the requirement of displaying the screen directly on the Mac. AirDrop is another functionality that allows users to share files wirelessly but does not allow for screen display. Finally, using the Messages app does not offer a means to share the screen of an iOS device with a computer. Therefore, QuickTime Player remains the most suitable method to achieve the objective of displaying an iPhone or iPad screen on a Mac.