Fixes for External Display Not Working on MacBook

Fixes for External Display Not Working on MacBook

Five solutions to get external display connected to your Mac

Mac book and a external monitorPhoto by Kari Shea on Unsplash

My Mac, all of a sudden, cannot connect with my external display monitor.

I spent a few hours troubleshoot and FINALLY my screen is back.

Below are 5 resolutions from my research and testing. Not all of them are working on me, but no harm to give a try.

My Device

  • MacBook Air (Retina, 13-inch, 2019)
  • macOS Catalina Version 10.15.4
  • HDMI cable to connect with my Philips External Monitor / TV

#1 Restart the machine

Like all the technology issues, restart your machine

Result for me: Negative

I would still recommend this as a first step because restart can somehow magically solve your problem.

#2 Update macOS

  1. Go to the Apple ? on your top left corner
  2. Click About This Mac
  3. Click Software Update
  4. Update your Mac into the latest version of iOS
  5. Restart your Mac

Result: Positive

#3 Turn off the monitor and replug it

There was another day my TV suddenly cannot detect my Mac again. I tried to restart and made sure my macOS was the latest version, but it still failed. So I did some research and tried an alternative approach.

  1. Unplug the cable
  2. Switch of the monitor
  3. Replug your cable
  4. Switch on the monitor

Result: Positive

#4 Force detection of the external monitor

  1. Connect your Mac with the external monitor
  2. Go to the Apple ? on your top left corner
  3. Click System Preference
  4. Click Display
  5. Hold Option and Click Detect Display

Screen shot of???Hold ?Option? then you will see Gather Windows become Detect DisplaysHold ?Option? then you will see Gather Windows become Detect Displays

Result: Negative

#5 Restart your Mac and force-connect to the external monitor

  1. Connect your Mac with the external monitor
  2. Go to the Apple ? on your top left corner
  3. Click Restart
  4. Immediately close your Mac
  5. Wait and see

This is a video for it.

Result: Negative

Conclusion

I hope this is helpful. Do let me know if there are some tricks that you tried as well, so I can include them in this article.

Thanks and good luck!

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