Catalina on Mac Mini Issue

cshook58 · 04-20-2020, 10:35 PM

I am running catalina on a late 2012 mac mini and experience an odd issue where if I try to run 3 monitors 1 from hdmi or thunderbolt port on the mac and 2 from my DisplayLink device (Startech USB3SDOCKDD). With this configuration I get display on all 3 monitors but one of the DisplayLink monitors is a mirror of the monitor plugged into the Mac. When I view the display preferences it shows 3 displays, when I click on the 1st Display link monitor the red outline shows, when I click on the on attached do mac I get red outline on it and the other monitor plugged into the usb dock, and when I click on the 3rd display nothing gets the red outline.

I tried with 1 monitor plugged into the HDMI on the mac, 1 plugged into the thunderbolt on the mac, and 1 plugged into the usb dock and the 3 displays operate separately as expected.

This dock with the same drive works fine on my mac book pro.

Any help would be greatly appreciated and I can post any screen caps that my help but don't want to post a bunch of images without knowing what will be helpful diagnosing this issue.

KatarzynaCzaja · 04-22-2020, 09:13 AM

Hello,

Please try those steps:

Go to System Preferences -> Display Settings -> Arrangement Tab
Select option to turn off mirroring
Press and hold 'Option' key and drag one of the mirrored monitors away from the other.

Cheers,
Katarzyna

cshook58 · 04-22-2020, 04:57 PM

Thanks Katarzyna, but that did not work. How ever on a whim I trying placing the white bar that indicates the main display on the display that would not highlight when viewing the arrangement and I get 3 independent display, but as soon as I move that bar to one of the other monitors I get the mirroring issue again.

This is not ideal but will work for now, I am happy to provide any screen shots or logs that may help resolve this issue.

KatarzynaCzaja · 04-24-2020, 11:53 AM

Hello,

Do you know what version of the driver do you have installed on your PC?

In case you are not sure please make sure that you use the newest one available on our website: https://www.displaylink.com/downloads/file?id=1552

Thank you,
Katarzyna

04-20-2020, 10:35 PM	#1
cshook58 Junior Member Join Date: Apr 2020 Posts: 2	Catalina on Mac Mini Issue I am running catalina on a late 2012 mac mini and experience an odd issue where if I try to run 3 monitors 1 from hdmi or thunderbolt port on the mac and 2 from my DisplayLink device (Startech USB3SDOCKDD). With this configuration I get display on all 3 monitors but one of the DisplayLink monitors is a mirror of the monitor plugged into the Mac. When I view the display preferences it shows 3 displays, when I click on the 1st Display link monitor the red outline shows, when I click on the on attached do mac I get red outline on it and the other monitor plugged into the usb dock, and when I click on the 3rd display nothing gets the red outline. I tried with 1 monitor plugged into the HDMI on the mac, 1 plugged into the thunderbolt on the mac, and 1 plugged into the usb dock and the 3 displays operate separately as expected. This dock with the same drive works fine on my mac book pro. Any help would be greatly appreciated and I can post any screen caps that my help but don't want to post a bunch of images without knowing what will be helpful diagnosing this issue.

04-22-2020, 09:13 AM	#2
KatarzynaCzaja DisplayLink Tech Support Join Date: Apr 2020 Posts: 461	Hello, Please try those steps: Go to System Preferences -> Display Settings -> Arrangement Tab Select option to turn off mirroring Press and hold 'Option' key and drag one of the mirrored monitors away from the other. Cheers, Katarzyna __________________ Katarzyna Czaja DisplayLink Check DisplayLink powered products here. Basic troubleshooting FAQs: Where to download the latest Windows drivers How to clean up a corrupted installation How to report Windows issues to DisplayLink for a speedy resolution How to report macOS issues to DisplayLink for a speedy resolution

04-24-2020, 11:53 AM	#4
KatarzynaCzaja DisplayLink Tech Support Join Date: Apr 2020 Posts: 461	Hello, Do you know what version of the driver do you have installed on your PC? In case you are not sure please make sure that you use the newest one available on our website: https://www.displaylink.com/downloads/file?id=1552 Thank you, Katarzyna __________________ Katarzyna Czaja DisplayLink Check DisplayLink powered products here. Basic troubleshooting FAQs: Where to download the latest Windows drivers How to clean up a corrupted installation How to report Windows issues to DisplayLink for a speedy resolution How to report macOS issues to DisplayLink for a speedy resolution

04-22-2020, 04:57 PM	#3
cshook58 Junior Member Join Date: Apr 2020 Posts: 2	Thanks Katarzyna, but that did not work. How ever on a whim I trying placing the white bar that indicates the main display on the display that would not highlight when viewing the arrangement and I get 3 independent display, but as soon as I move that bar to one of the other monitors I get the mirroring issue again. This is not ideal but will work for now, I am happy to provide any screen shots or logs that may help resolve this issue.