Use your iPad as a second display for your Mac with Sidecar

With Sidecar, you can use your iPad as a display that extends or mirrors your Mac desktop.

Extend or mirror your Mac desktop with Sidecar

1. Make sure that your Mac and iPad meet the Sidecar system requirements.
2. You can use Sidecar wirelessly, but to keep your iPad charged during use, connect it directly to your Mac with the USB charge cable that came with your iPad.
3. Click the AirPlay icon  in the menu bar on your Mac, then choose the option to connect to your iPad. Or use Sidecar preferences to connect.
   If you don't see the AirPlay icon, choose Apple menu  > System Preferences, click Displays, then make sure that ”Show mirroring options in the menu bar when available” is selected.
4. Your iPad should now show an extension of your Mac desktop. You can move windows to it and use it like any other display.
5. To mirror your Mac display so that both screens show the same content, return to the AirPlay menu, which is a blue rectangle  while using Sidecar. Choose the option to mirror your display. This is a great way to share your Mac screen with others.
6. To end your Sidecar session, return to the AirPlay menu and choose the option to disconnect. Or click the Disconnect button in the sidebar on your iPad.

Learn more about using external displays. For example, you can use Displays preferences to arrange displays so that your iPad extends the left, right, top, or bottom of your desktop.