Your Mac isn't detecting your external monitor
Unplug the monitor cable from your Mac and wait 10 seconds, then plug it back in firmly. If it still doesn't show, restart your Mac. Most monitors connect as soon as the cable is seated properly.
Your Mac doesn't detect the monitor because the cable is loose, the port is disabled, or the monitor needs a fresh connection. Reseat the cable firmly, restart your Mac, and check that the monitor is set to the right input source.
Risk: Medium
⏱ 10–15 minutes
Beginner
⚡ Before you start
- ✓Have the monitor's power cable ready
- ✓Know what type of cable your monitor uses (HDMI, USB-C, or Thunderbolt)
- ✓Keep your Mac nearby during troubleshooting
Fix-IT-Bot will walk you through each step, just tap, no typing needed.
Skip, I just want a technicianCommon mistakes to avoid
- Not pushing the cable in all the way. It needs to click into place
- Restarting the monitor instead of the Mac. The Mac needs the restart
- Plugging into the wrong port on the Mac without checking
Signs you need professional help
- You've tried multiple cables and ports and the monitor still doesn't show, or monitor works on another Mac but not yours
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