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Old 11-24-2017, 09:26 AM   #61
Junior Member
Join Date: Nov 2017
Posts: 4

Turns out my black screen issues were the cause of mirroring as well. I did not think it was the issue since this setup was without mirroring before upgrading to high sierra, but it seems my display settings where reset during the upgrade and for some reason, osx defaults to mirroring.

Trouble was that my mouse cursor got locked when I logged in (after getting kicked out), so I couldent deactivate the mirroring even with system settings open. Tab just took me to the search input field.

I solved it by finding the shortcut for toggling mirroring, which was cmd+"screen brightness down". For newer macbook pros, expand control strip and its to the far left.

After that all screens came alive. Puh!

Last edited by Johan; 11-24-2017 at 09:29 AM.
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