2nd monitor not working


I have upgraded laptop from windows to Mac book M3. I have USB Docking station from pluggable UD-ULTCDL.
I got 2 monitors (1 new & 1 old)
Samsung LU28R55 – New one
Philips 2263VL – Old one
With windows everything used to works fine but with Macbook my old monitor neither connects with either DVI nor with HDMI.
Can you please help. Let me know if you need more details.

Hi Nitin,

Thank you for contacting Plugable! I’m sorry the UD-ULTCDL isn’t working as expected with your Mac, and I’ll be happy to assist.

The three video output ports on the UD-ULTCDL (labelled in the image below) each work using different technologies.

The “4K HDMI” port uses DP Alt mode from the connected computer to produce video, whereas the “HDMI” and “DVI” ports use DisplayLink Technology. From your message, I believe the ports not working are “HDMI” and “DVI”, is that correct?

The most common reason these ports would not work on a Mac is that the DisplayLink Manager is either not installed or isn’t currently running on your Mac.

In case you haven’t installed the DisplayLink Manager yet, you can find a download link with installation instructions here: https://plugable.com/products/ud-ultcdl#nav-get-started

However, if you have installed the DisplayLink Manager and these ports are still not working correctly, it’s possible that the DisplayLink Manager isn’t currently running. This software is responsible for allowing the “HDMI” and “DVI” ports to output video.

You can see that the DisplayLink Manager is running by checking if its icon is present in the macOS menu bar at the top of your screen. When the icon isn’t present the DisplayLink Manager is not running.

If the DisplayLink Manager isn’t running, you can start it by following these steps:

  1. Open Finder
  2. Navigate to the Applications folder on the left side of the Finder window
  3. Within the Applications folder, locate the DisplayLink Manager
  4. Double-click on the icon for DisplayLink Manager to open it
  5. Verify that the DisplayLink Manager icon appears in the macOS menu bar, indicating it’s running

Please let me know how these steps work out, and feel free to ask if you have any questions.

My apologies for the frustration, and thank you for giving us the chance to help.

Plugable Technologies

Thanks You

It has resolved my issue