CalDigit Thunderbolt 3 Docking Stations including TS3 Plus, TS3 and TS3 Lite as well as T4 Thunderbolt 3 RAID are compatible with the Apple Thunderbolt Display (Thunderbolt 1 & 2 versions). Apple’s Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter is required to connect in between the dock’s Thunderbolt 3 port and Thunderbolt 1/2 display.
Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter
You can daisy chain up to TWO Thunderbolt 2 displays from a single Thunderbolt 3 bus. Below is the setup to show 2018 MacBook Pro, CalDigit TS3+, Apple adapter and two Apple Thunderbolt 2 displays connecting together.