Connect your computers with Computer-to-Mac Mode

What is Mac-to-Mac Mode?

Luna Display's Mac-to-Mac mode allows you to use a Mac as a second display for your primary Mac.

Please note:
  • Luna Display currently supports the iMac as a non-retina display when using it as a secondary Mac in Mac-to-Mac mode.
  • Luna Display supports the new M1 Apple Silicon chip on Mac, though there are some hardware limitations on the number of external displays allowed. Check Apple's device technical specifications to see what is compatible with your device.

Connect your Macs using Wi-Fi

Connect both Macs to the same Wi-Fi network.

If the Macs are using different networks, they will not be able to find each other. You may connect via Wi-Fi or with an Ethernet or Thunderbolt connection.
Luna Primary Mac app icon Open the Luna Primary app on your Primary Mac.

The Luna Primary app has an icon with a grey and white cat.
- For macOS Mojave or later: enable Accessibility in System Preferences
- For macOS Catalina or later: enable Screen RecordingLuna Display does not record or save the contents of your screen.

Luna Secondary Mac app iconOpen the Luna Secondary app on your Secondary Mac.

The Luna Secondary app has an icon with a black and grey cat.

Both Macs should automatically connect!

Connect your Macs using Ethernet or Thunderbolt

Connect an Ethernet or Thunderbolt cable directly between your Macs. You can also connect the Ethernet cable directly to your router. You will still need to plug the Luna Display hardware into your Mac.

How do I use a USB, Ethernet, or Thunderbolt connection?


Using Wi-Fi Manual Connect

Select Wi-Fi Manual Connect on both the Primary and Secondary Luna Mac apps.
Four sets of numbers will appear in the Luna app on your Primary Mac.

A similar four sets of numbers should also appear in the Luna app on your Secondary Mac, but with a few missing digits.

Enter the last few digits of the number set from the Primary Mac into the Secondary Mac to complete the number sequence.

Select Connect on your Secondary Mac app after entering the numbers. Your Macs should now be connected!

If the Macs do not automatically connect:

  • check that both Macs are connected to the same network
  • check that both Macs are connected to the same network bandwidth (5GHz or 2.4GHz)
  • check that the correct apps are open on each Mac
  • try Manual Wi-Fi Connect
  • try connecting with Ethernet or Thunderbolt
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