Human: How to mirror from mac to apple tv? Assistant: 
Mirror from Mac to Apple TV
1. Connect the Mac and Apple TV to the same Wi-Fi network.
2. Click the Apple menu.
3. Click System Preferences.
4. Click Displays.
5. Click Display.
6. Select Apple TV from the "AirPlay Display" menu.
7. Click the back button and select Sound.
8. Click Output.
9. Click Apple TV.