Seeing a black screen on your secondary Mac? This is a known issue that mainly affects Macs running macOS Ventura 13 or later. Follow our Terminal fix below.
🔍 When to Use This Fix
You'll see these symptoms:
🚫 Luna logo doesn't appear when launching Luna Secondary
⬛ Completely black screen on the secondary Mac
📋 Luna menu bar is missing on the secondary Mac
⚠️ Affected systems: Macs running macOS Ventura 13 or later (including future betas)
🛠️ Steps to Fix Black Screen
Step 1: Close Luna Secondary
Quit the Luna Secondary app completely
Step 2: Open Terminal
Open Terminal (Finder > Applications > Utilities > Terminal)
Step 3: Run the Fix Command
Copy and paste this command into Terminal and press Return:
defaults write com.astro-hq.LunaSecondaryMac LNExclusiveFullscreen -bool NO
Step 4: Restart Luna Secondary
Reopen the Luna Secondary app
✅ You should now see the Luna logo and have access to the menu bar