Make sure your Mac and AirPlay device are connected to the same Wi-Fi network
Click the Control Center icon in the menu bar
Click Screen Mirroring
Select the AirPlay device you want to use
Enter the AirPlay code if prompted
To stream audio only, open the app or media you want to play and choose the AirPlay output device
To stop AirPlay, click Screen Mirroring or the AirPlay icon again and select Stop Mirroring or your Mac’s display
If AirPlay is not available, check that your Mac and device support AirPlay and that both are updated to the latest software