ventura 13.5.1 won't detect external display

Question

Level 1

4 points

ventura 13.5.1 won't detect external display

Since updating to Ventura, I can no longer connect to my television monitor using my USB C adapter connected to my HDMI cable. When I click on Displays>Detect Displays, my computer does not detect anything other than my Built In Display. I have restarted and turned everything on and off. I have tried changing screen resolutions. Is it because my Panasonic HD television is too old? It has worked with every other Mac software version. I am using Ventura 13.5.1.

Posted on Aug 31, 2023 2:47 PM

Reply

Answer 1

DerekM87

Community Specialist

Sep 1, 2023 12:29 PM in response to sbartel23

Hi sbartel23,

Do you have another monitor or TV you can test with?

In some cases a firmware update or update on the side of the TV or monitor may be required to maintain compatibility with macOS. If possible testing with a different monitor will help isolate the issue.

In the meantime, we can also recommend the steps here to help isolate further:

If your Mac doesn’t recognize an external display - Apple Support

Cheers!

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Answer 2

bryanr14

Community Specialist

Sep 1, 2023 2:52 PM in response to sbartel23

Hi sbartel23

Thanks for providing us those details. Based on the information we've gathered, we recommend for you to contact Panasonic to see if it's compatible with macOS Ventura. Here's the link to contact Panasonic: Panasonic - Contact Us

Kind regards.

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Answer 3

sbartel23 Author

Level 1

4 points

Sep 1, 2023 1:59 PM in response to DerekM87

Thank you for you answer. Ventura does work with my external computer monitor but it does not work with my Panasonic Viera TC-50LE64 HDTV. The Panasonic television is up to date with the latest software but the television is 10 years old, so I am worried that Mac no longer supports an HDMI connection with this model. I can successfully connect to the Panasonic with one of my older MacBooks that is not running Ventura. I have already tried all of the troubleshooting in the link that you included.

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Answer 4

ACukier

Level 1

4 points

Sep 4, 2023 6:21 PM in response to sbartel23

I am having a similar problem. I am running a Mac Mini (2018) and using two Samsung external monitors. I have had this set-up for 3 years. Since upgrading to 13.5.1, I have had a problem with my computer not recognizing the monitors after sleep. I have replaced the monitor cables. The only way I can "wake-up" the monitor is to unplug them and plug them back in.

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Answer 5

ApMaX

Level 2

154 points

Sep 5, 2023 12:01 AM in response to ACukier

A least you can workaround it with Samsung devices, but no way with Panasonic ones, and the problem is not in Panasonic. It is in Ventura, as explained in the link of my message above. Apple should fix this.

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