2. Is the UD-3900C4 Compatible With ...

Is the UD-3900C4 Compatible With Intel, M1, M2, and M3 MacBooks?

Last Update: October 6th, 2026
Article ID: 2834231

Yes. The UD-3900C4 is compatible with Intel, M1, M2, and M3 Mac computers. However, macOS supports a maximum of three unique extended displays through the dock.

Why Does macOS Support a Maximum of Three Extended Displays?

The UD-3900C4 uses two different display technologies across its four HDMI outputs.

HDMI 1 and HDMI 2 use DisplayLink technology and can operate as separate extended displays on macOS when DisplayLink Manager is installed and configured.

HDMI 3 and HDMI 4 use the Mac's native DisplayPort video output. macOS does not support Multi-Stream Transport (MST), so HDMI 3 and HDMI 4 cannot operate as two separate extended displays. Instead, these two outputs will mirror each other.

As a result, the UD-3900C4 can provide up to three unique extended displays on macOS:

  • Two displays through HDMI 1 and HDMI 2 using DisplayLink
  • One unique native display across HDMI 3 and HDMI 4

For the latest DisplayLink Manager software, installation information, and downloads for older macOS versions:

https://plugable.com/pages/displaylink

For more information about DisplayLink and Alt Mode MST:

https://kb.plugable.com/question/1390565

For more information about DisplayPort Multi-Stream Transport:

https://kb.plugable.com/question/1731339

Applicable To

  • UD-3900C4