Click 'Output' and choose your TV from the list of choices. If you want your television also to play audio from your Mac, choose the Apple menu, then select System Preferences > Sound. On the 'Display' tab, select 'Default for display' to automatically use the best resolution or 'Scaled' to manually select a resolution. Once both machines are connected, you can adjust the resolution on your TV by choosing the Apple menu on your computer, then selecting System Preferences > Displays. With these models, you’ll need an adapter or hub to get the job done. Recent-generation MacBook models only come with Thunderbolt ports. Check your TV manual for more port information. The other end should connect to the television’s video input port. Your video cable must be able to connect to your MacBook’s Thunderbolt port, HDMI port, or DVI port.

If you have a TV without AirPlay 2-compatibility, you can connect it to your MacBook using physical cables. How to connect a MacBook to a TV using cables When finished, select 'Off' from the AirPlay/Screen Mirror pull-down menu. Arrange the display boxes, putting your TV display before or after the MacBook display in the on-screen example. To do so, go back into the Display settings. While mirroring, you may want to extend your MacBook display on your smart TV.

How to screen mirroring on mac