After the Mac has shutdown, wait for 60-90 seconds, then turn the Mac back on.

(On your Mac, click the 'Apple' menu and select 'Shut Down') Please leave the dock disconnected until the final step.

Unplug the dock from the Mac and unplug power from the dock.

Charging should also be unaffected.įor most users simply unplugging the docking station from the computer, waiting 10-15 seconds, then reconnecting the docking station will restore the functionality, if this does not help please try these additional steps to fully reset the docking station and computer: The primary USB-C DisplayPort Alternate Mode based video output and connected display should remain functional after reboot. This issue affects the UD-ULTCDL (original version), UD-ULTC4K (original version), and UD-3900PDZ docking stations along with any connected USB 2.0 and 3.0 devices, including the two DisplayLink based video outputs, Ethernet, and audio controlled by the DisplayLink USB Graphics chipset. Some users have reported after macOS Big Sur 11.1 and newer that their USB-C Triple Display Docking Stations may not be correctly detected by Apple’s MacBook Air, MacBook Pro, Mac Mini, iMac, and Mac Studio computers with M1, M1 Pro, or M1 Max processors after being restarted, when powered on after being turned off, or after being in sleep mode and then woken up.

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