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