The CalDigit Thunderbolt 3 Mini Dock is a bus-powered dock that lets you connect your Thunderbolt 3 equipped Mac to two HDMI-enabled TVs or displays up to 4K at 60Hz. It also provides connection to a Gigabit Ethernet network, a USB-A 3.0. device—such as your flash drive, camera, or SD card reader—and a USB 2.0. keyboard/mouse. Get to work fast with one cable from your USB-A- and USB-C™-enabled notebooks1 to your displays, devices, and wired network with the flexible, compact HP USB-C/A Universal Dock G2. The dock is driven by DisplayLink and compatible with notebooks from HP, Apple®, Dell, Lenovo, and more.2.
While Lenovo doesn't supply a driver for the display adapters, the chipset inside it (and as far as I can tell, all other USB 3.0 to DisplayPort devices) is provided by DisplayLink. You can install the generic DisplayLink adapter drivers directly from their website at: http://www.displaylink.com/support/index.php
I installed the v2.2 drivers on my 10.9 MBP and the display immediately popped up on the attached monitor after the required reboot.
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There are also installers for 10.4 - 10.5 and 10.6 - 10.9 in the same driver download.
-Tim