Mac High Sierra 10.13.3 with UD-ULTCDL doesn't recognize HDMI 2K port.

Mac High Sierra 10.13.3 with UD-ULTCDL doesn’t recognize HDMI 2K port. Note says not to go to 10.13.4, which I have not, but still having repeated issues with HDMI 2K port not recognizing. What’s the fix?

Hello Mike,

Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.

We have a troubleshooting tool that helps us find out what is going on in situations like this. Please plug the device into your computer, then go to this page and follow the instructions there:

Please don’t hesitate to let us know of other questions.

Thanks again for contacting Plugable support and best wishes!

Joshua Henry
Plugable Technologies