The Plugable TBT-UDM is a Thunderbolt 4 docking station based on the Intel Goshen Ridge chipset. The dock’s display capabilities depend on the display output limitations of the connected host system.
Apple M-Series MacBooks
- M4, M3 Pro/Max, M2 Pro/Max, and M1 Pro/Max MacBooks:
- Support up to two external displays.
- M1 and M2 base models (non-Pro/Max):
- Support only one external display.
- M3 base models:
- Support two external displays only when the lid is closed.
- When the lid is open, only one external display is supported.
(Note: Display support is limited by the MacBook model’s GPU/SoC, not by the dock.)
Dock Video Output Configuration
The TBT-UDM provides:
- 2x HDMI video output ports
- 1x downstream Thunderbolt 4 port, which can also output video when connected to a compatible display or USB-C/Thunderbolt video adapter.
The dock supports up to two total external displays. You can connect:
- Two HDMI displays, or
- One HDMI display + one display via the downstream Thunderbolt 4 port (using a USB-C or Thunderbolt display, or a USB-C video adapter).
Display Output Behavior
The dock allocates display bandwidth on a first-come, first-served basis. Once two displays are active, any additional connected displays will not output video.
