Help get this topic noticed by sharing it on Twitter, Facebook, or email.
Gary Z (Official Rep) March 30, 2018 16:36

macOS 10.13.4 is incompatible with DisplayLink, Duet Display, and more

We have important news about macOS 10.13.4. This new macOS release only supports displays which are directly provided by a GPU or via AirPlay.

For UD-ULTCx Docking Stations, this means versions of Apple macOS after 10.13.3 will only support the single 4K HDMI port on the dock which uses DisplayPort Over USB-C technology (which is directly GPU connected). The second and third displays on the dock -- the DVI and 2K HDMI ports using DisplayLink technology -- will no longer function. Windows and Chromebook computers are not affected, and will continue to work as usual.

Note: All brands of USB docking stations which use DisplayLink chips and drivers are affected. This includes Targus, Dell, Toshiba, Kensington, Anker, StarTech; if the dock uses DisplayLink for graphics, it will no longer function as expected after updating to macOS 10.13.4.


To continue to use all dock functions with your Mac, macOS updates must be disabled to remain on 10.13.3. To do so, uncheck the two highlighted boxes in the screenshot below. The boxes to uncheck (disable) are "Download updates in background" and "Install macOS updates" These are found in the "App Store" portion of "System Preferences" within macOS.

It's important to do this proactively now, as it's difficult to revert macOS versions later.

We'll continue to update the following blog post with the most up-to-date information available:
  • I just set up a UD-ULTCDL with a 2017 15" MacBook Pro. I'm using the 2K HDMI and the DVI ports for dual external monitors. Are you telling me this will not longer work once I upgrade to 13.4? Not keeping up to date is not an option.

    I was unable to get the 4K HDMI port to work at all - display was very fuzzy. I'm using two Dell U2410 monitors.

    Currently this is the perfect dock for me but it becomes useless without dual monitor functionality. Are there plans to make this work again or do I keep looking for another solution?

  • (some HTML allowed)
    How does this make you feel?
    Add Image

    e.g. happy, confident, thankful, excited indifferent, undecided, unconcerned kidding, amused, unsure, silly sad, anxious, confused, frustrated