📋 Common causes
Your Mac has reached its display limit
Luna is plugged into an incompatible port
Other USB devices are consuming too much bandwidth.
Why You're Seeing This Error
1. 📺 Display Limit Reached
1. 📺 Display Limit Reached
Luna Display functions as a regular external monitor, and Macs support a limited number of displays based on the model.
How to check your Mac's display support:
Visit Apple's Technical Specifications for your Mac model
Look under the "Display Support" section
Example: 2020 M1 Mac Mini supports only two external displays
✅ Solution: Disconnect other external monitors to free up display connections for Luna.
2. 🔌 Incompatible Port Connection
2. 🔌 Incompatible Port Connection
For optimal performance, Luna requires a direct connection to a compatible port without adapters, docks, or hubs.
⚠️ Critical: Mac Studio and M4 Mac Mini users use rear Thunderbolt/USB 4 ports only
Front USB-C ports don't support display output
This will always cause the "No Luna Display Found" error
⚠️ Critical: iMac users use ports labeled "Thunderbolt/USB 4"
Typically labeled with a lightning bolt symbol
Standard USB-C ports on iMacs do not support display output
Only Thunderbolt-capable ports will work with Luna
3. 🚫 Bandwidth Interference
3. 🚫 Bandwidth Interference
Other USB or Thunderbolt devices may consume excessive bandwidth, preventing Luna from connecting.
Intel Mac considerations
Thunderbolt ports are grouped in pairs that share bandwidth
High-resolution monitors, docks, or external drives can monopolize resources
This leaves insufficient bandwidth for Luna Display
Quick Fixes
1. 🔄 Unplug Other Devices
Remove all unnecessary USB/Thunderbolt devices
Test Luna connection with minimal devices connected
Gradually reconnect devices to identify conflicts
2. ↔️ Switch Ports
Try different Thunderbolt ports on your Mac
Avoid ports currently used by high-bandwidth devices
Test each available display-capable port systematically
3. ✅ Verify Port Compatibility
Mac Studio/M4 Mac Mini: Use rear Thunderbolt/USB 4 ports exclusively
iMac: Confirm you're using Thunderbolt/USB 4 labeled ports
All Macs: Avoid USB-C ports that don't support display output
Advanced Troubleshooting
🔋 Power Management
Reset SMC (System Management Controller) on Intel Macs
Restart your Mac to refresh Thunderbolt bus
Check for macOS updates that may resolve display issues
📊 Bandwidth Optimization
Prioritize Luna Display by disconnecting external storage during use
Use lower resolution settings on other connected displays
Consider using separate Thunderbolt buses for different device types
🖥️ Display Detection
Open System Settings > Displays to verify connected displays
Check if Luna appears as an unrecognized display
Force display detection: hold Option while clicking Detect Displays
🔧 Hardware Verification
Test Luna on a different Mac (if available) to rule out hardware issues
Try a different Thunderbolt cable
Ensure Luna's firmware is up to date
Mac Model-Specific Guidance
M1/M2 MacBooks:
Support 1-2 external displays (varies by model)
Use native Thunderbolt ports for best results
Intel MacBooks:
Generally support 2+ external displays
May require specific port configurations for multiple displays
Mac Pro:
Supports numerous displays
Check specific Thunderbolt card capabilities
💡 Tip: Create a "Luna setup" by noting which port and configuration works best, then use the same setup each time.
🆘 Still experiencing issues?
Contact our support team with your Mac model and current setup for personalized troubleshooting assistance.