new 27" iMac cannot detect second monitor. Option key does not bring up detect display in system preferences.

New iMac running on Monterey 12.2.1

Cannot detect second monitor. Help says to hold down option key while in displays (system prefs) and Night Shift will toggle to Detect Displays. Not working

Posted on Feb 28, 2022 11:12 AM

Top-ranking reply

den.thed

Level 10

91,414 points

Posted on Feb 28, 2022 12:11 PM

What USB-C/Thunderbolt 3 to DVI adapter?

First I would make sure the monitor is set to DVI.

Then I would test that adapter plugged into a different port on the iMac

Lastly I would test a different USB-C/TB3 to DVI adapter that states it is Mac compatible.

https://www.amazon.com/Thunderbolt-Adapter-Converte https://www.monoprice.com/product?

https://www.amazon.com/dp/B07CCKTKXV/ref=sspa_dk_detail_1?

https://www.monoprice.com/product?

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new 27" iMac cannot detect second monitor. Option key does not bring up detect display in system preferences.

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