USB devices and/or displays are not detected after waking from sleep or after rebooting on macOS.

Last Update: April 15th, 2021
Article ID: 815680

We have been tracking reported issues where externally connected USB devices and internal USB devices within the TBT3-UDZ docking station (Ethernet, audio, and card reader) may not be detected after waking the system from sleep or after rebooting on some macOS systems. Some users may also experience one or both displays attached to the dock not waking as well.

If experiencing issues with the Ethernet only, please see:

To begin troubleshooting USB device and/or display issues, if using an Intel based Mac we recommend the following steps:

  1. Unplug the dock from the Mac
  2. Perform an SMC reset: 
  3. Perform an NVRAM/PRAM reset:
  4. Plug the dock back in to the Mac and see if the behavior has improved

If these initial troubleshooting steps do not help, please contact us at and we'll be happy to assist you.