Mac not detecting external monitor or display
Try a different USB-C cable or adapter. Make sure the monitor is powered on and set to correct input. Check System Settings → Displays to see if it recognizes the monitor. Restart both devices to re-establish the connection.
External monitor problems stem from faulty adapters, incorrect monitor input, loose connections, or resolution detection failures. Try a different cable, make sure the monitor is on, check the input source, or restart both devices.
- ✓Have your monitor's power cable plugged in
- ✓Know what type of connection your monitor uses
- ✓Have 5–10 minutes available for troubleshooting
Fix-IT-Bot will walk you through each step, just tap, no typing needed.
Skip, I just want a technicianCommon mistakes to avoid
- Using cheap USB-C adapters that don't support video output
- Assuming monitor is broken when it's just on the wrong input
- Not powering on monitor before connecting to Mac
- Giving up after first cable attempt when a different adapter can work
Signs you need professional help
- Monitor works on other computers but not your Mac, or multiple quality adapters fail
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