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rcusick · 06-04-2025, 10:38 PM

I have been tearing my hair out trying to figure out why I couldn't get a second monitor to work (after the recent Mac OS update). I finally found a solution that worked for me:

a) Connect the first external display to HDMI display 2
b) Connect the second external display to DisplayPort Display 3

Connecting one monitor to Display 1 does not work. Connecting both monitors to HDMI (1 and 2 or 2 and 3) does not work.

Go figure... Note: both are treated as "virtual displays" now.

Hope this helps...

06-04-2025, 10:38 PM	#1
rcusick Junior Member Join Date: Jun 2025 Posts: 1	Solution - Second Monitor Not Working I have been tearing my hair out trying to figure out why I couldn't get a second monitor to work (after the recent Mac OS update). I finally found a solution that worked for me: a) Connect the first external display to HDMI display 2 b) Connect the second external display to DisplayPort Display 3 Connecting one monitor to Display 1 does not work. Connecting both monitors to HDMI (1 and 2 or 2 and 3) does not work. Go figure... Note: both are treated as "virtual displays" now. Hope this helps...