Apple Thunderbolt 3 to Thunderbolt 2 and Thunderbolt Display
Connecting 2 Thunderbolt displays using daisy chain with the Thunderbolt 3 (USB-C) to Thunderbolt 2 didn't work for me until I upgraded to the latest Sierra build. (10.12.13) now everything is working as it should. If upgrading didn't work for you I suggest that the adapter is faulty.