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syeed192 Author

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

Top-ranking reply

Alejandr058

Level 1

4 points

Posted on Jun 27, 2020 5:41 PM

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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External Display Brightness Issue

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