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Luna Display Bug: Can’t Connect in Computer-to-Mac Mode?

Running into connection issues in Computer-to-Mac mode? It might be caused by a known bug affecting the connection filter.

Updated over 3 weeks ago

Quick Answer

🐞 Bug Alert: Can’t Connect in Computer-to-Mac Mode?

If you're unable to connect Luna Display in Computer-to-Mac mode, it might be due to a known bug where your secondary Mac switches to an incompatible connection filter.

Try this 3-step workaround:

  • Check the connection filter on your primary device

  • Reset Luna on your secondary Mac

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

  • Relaunch Luna on both devices and try connecting again

⚠️ Heads up: This workaround doesn’t work in all cases. If it fails, reach out to Astropad Support for help.

Getting Started

🛠 Step 1: Check the Connection Filter on Your Primary Device

🍏 Mac Users

  • Open Luna Display on your primary Mac

  • Go to Settings > Mac-to-Mac

  • Set the "Connection Filter" to Allow any network interface (default)

Windows PC Users

  • Open Luna Display on your PC

  • Go to Preferences > Connectivity

  • Set the "Connection Filter" to Allow any network interface (default)

♻️ Step 2: Reset Luna on Your Secondary Mac

  1. Quit Luna Display on both devices

  2. On your secondary Mac:

    • Open Finder

    • Go to: Go > Go to Folder

    • Paste 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.

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