The Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter lets you connect Thunderbolt and Thunderbolt 2 devices.
Compatible with Mac models:
12-inch MacBook
13-inch MacBook Air with Retina display
13-inch MacBook Pro - Thunderbolt 3 (USB-C)
15-inch MacBook Pro - Thunderbolt 3 (USB-C)
21.5-inch iMac - Thunderbolt 3 (USB-C)
27-inch iMac - Thunderbolt 3 (USB-C)
Mac mini - Thunderbolt 3 (USB-C)