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Level 1

36 points

External monitor problem iMac 2017 High Sierra.

I try to connect a Samsung external monitor to my new 2017 iMac, but the monitor isn´t being recognized. I used the same monitor with my 2012 Mac mini and it all worked fine (even with two monitors).

I use a new USB – C 3.1 to DVI adaptor, but my iMac isn´t recognizing my Samsung monitor.

I have just updated to Mac OS High Sierra and it still doesn´t work (it didn`t work with Mac OS Sierra either).

And yes, I have opened up system preferences and Displays. Using my Mac mini, the Samsung display showed up in preferences.

Searching the net, it seem to be a problem for many people, but I cannot find a solution.

Any suggestions?

Thank you.

Jesper

iMac, macOS High Sierra (10.13), null

Posted on Sep 26, 2017 6:28 AM

Best reply

Manicek

Level 1

9 points

Posted on Oct 4, 2017 6:15 AM

Also having a problem after updating to High Sierra. I have one display connected with displayport and a second display connected with HDMI. I cannot get them to work at the same time. The mouse cursor is displayed on both, but one of the displays is always completely black. Which one works seems to be random and changes when I unplug one of them and then plug it back

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235 replies

Jessisko

Level 1

4 points

Jan 1, 2018 6:37 PM in response to d3vinda

🙂 T H A N K Y O U d3vinda!!

I have been searching online for weeks for a solution to this monitor issue. I am very, very grateful. It was starting to do my head in. Best wishes for a happy new year