USB Mac-to-Mac requirements
Luna Display 5.3 or later installed on your devices
macOS 10.15 or later on both Macs
A compatible USB cable (see below)
Compatible USB cables
You’ll need either a USB-C to USB-C cable or a USB-C to USB-A cable, depending on the ports available on your devices.
⚠️ Important:
Apple USB-C charging cables (included with iPads and Macs) ARE NOT compatible with Mac-to-Mac mode – they are USB v2 cables while we require USB v3.1 or later.
USB hubs, adapters, or docks are not compatible for Mac-to-Mac USB. Plug the cable directly into the Mac’s port.
USB-A to USB-A cables are not supported.
The USB-A side of the USB-C to USB-A cable must be plugged into the secondary Mac. The primary Mac will not support the USB-A side of the cable.
USB-C to USB-C cables
USB-C to USB-C cables
Use this cable type if both Macs support USB-C. Look for cables labeled USB 3.1 or 3.2 with 20Gbps or higher and 4K @ 60Hz support.
Cables from Amazon we've tested and liked:
⚠️ IMPORTANT: While we have tested these cables, due to differences in hardware between Mac models, even recommended cables may not work in all setups. Please use discretion when selecting a cable.
USB-C to USB-A cables
USB-C to USB-A cables
Use a cable similar to this type if your Primary Mac supports USB-C but your Secondary only supports USB-A.
Cables from Amazon we've tested and liked:
⚠️ IMPORTANT: While we have tested these cables, due to differences in hardware between Mac models, even recommended cables may not work in all setups. Please use discretion when selecting a cable.
⚙️ How to connect using USB
Plug the USB cable directly into both Macs (no hubs or adapters).
Plug the Luna Display hardware into your Primary Mac.
Launch the Luna Display app on your Primary Mac and the Luna Secondary app on the Secondary Mac.
If everything is compatible, Luna will connect automatically over USB.
🎯 How to confirm Luna is using USB
On your Primary Mac, open the Luna Display app.
Look in the upper right corner of the Luna Settings window — if USB is active, you’ll see a cable icon with the word "USB" next to it, like the image below.
Not Connecting? Troubleshoot your USB Connection: