Computer-to-Mac — Connection Issues

Trouble Connecting Over Ethernet, Thunderbolt, USB or Wi-Fi?

If you're using Luna Display in Computer-to-Mac mode and unable to connect, it might be due to a known issue where the secondary Mac’s connection filter switches to an incompatible type. Here's how to reset the connection and get things working again.

Heads up: This workaround doesn’t work in all cases. If it doesn’t help, reach out to our Support team and we’ll be happy to help!

Step 1: Check Connection Filter on Your Primary Device

On Mac:

Open Luna Display on your primary Mac
Go to Settings > Mac-to-Mac
Set the "Connection Filter" to Allow any network interface (default)

On Windows:

Open Luna Display on your PC
Go to Preferences > Connectivity
Set the "Connection Filter" to Allow any network interface (default)

Tip: Plug in your cable before launching Luna to make sure it's used as the main connection.

Step 2: Reset Luna on Your Secondary Mac

Quit Luna Display on both devices
On your secondary Mac, open Finder and go to: Go > Go to Folder

Paste in this path and press Return:

~/Library/Application Support/astropad/LunaSecondary/

Delete any files with "state_sync" in the name

Step 3: Reconnect

Launch Luna on both your primary and secondary Macs again, and try connecting. This should reset the pairing and allow the connection to complete.

Still stuck? Get in touch with our Support team and we’ll help you troubleshoot!