Apple TV is a great device for streaming content from your computer. However, if you want to delete it from your Mac, there are a few steps you can take. First, open the System Preferences and click on the Apple TV icon in the left-hand pane. Then, select Delete Apple TV from this device when prompted. If you have multiple Apple TVs, you will need to delete them one by one. Once all of them have been deleted, your Mac will be cleanly updated with the latest software and devices.