Still in the Displays > Arrangement view drag the second screen below or beside the primary screen so that the placement feels logical to you. If you have chosen two separate displays you’ll want to arrange them in such a way as to make moving your mouse between the two screens less frustrating.Then you will be able to make these changes just by clicking on the AirPlay icon in the menu. To make further changes easier you can also tick the box beside Show mirroring options in the menu bar when available.This will stop the two displays from being the same (if you want them to be the same check the box beside Mirror Displays). In System Preferences click on Displays > Arrangement and deselect Mirror Displays.If you’d like to make changes open System Preferences. You can also change the resolution and other settings. You can change this if you would prefer to use the TV as a second screen, for example. You will now see your screen mirrored on the TV.Find your Apple TV in the section under AirPlay 2 – it may be named after the room it is located in, depending on how you set it up.Click on the AirPlay icon in your menu at the top of your screen (a rectangle with a triangle below).

Make sure your Apple TV and Mac are both on the same WiFi network – they need to both be connected to a WiFi network in order for the connection to be established (which is frustrating if there isn’t a WiFi network!).

Plug your Apple TV into an HDMI port on the back of your TV.

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