External Display Brightness Issue

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Level 1

5 points

External Display Brightness Issue

I am using an Asus PA27AC with my Mac as external monitor. But i cant change the brightness of asus monitor from my Mac.

If anybody have experience with this monitor please help.

Thanks in advance.

Posted on May 17, 2020 12:07 AM

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Answer 1

Jun 27, 2020 5:41 PM in response to syeed192

Hi, it happens because the monitor detects that de Mac signal is HDR and when HDR is ON in the PA27AC all the options are disabled. Try unchecking HDR in displays option in System preferences. It works for me to change brightness manually.

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Answer 2

syeed192 Author

Level 1

5 points

May 17, 2020 3:41 AM in response to ailu

Thanks for your reply. But when I connect my monitor with Mac, monitor brightness and resolution option are automatically showing disable. So there is no way to control brightness.

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Answer 3

ailu

Level 1

15 points

May 17, 2020 2:08 AM in response to syeed192

In general, MacOS doesn`t "speak" with 3rd party displays. I can see that the Asus PA27AC has buttons on the side, so hopefully you can adjust the brightness/contrast there.

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External Display Brightness Issue

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