he Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter lets you connect Thunderbolt and Thunderbolt 2 devices — external hard drives and Thunderbolt displays, for example — to any of the Thunderbolt 3 (USB-C) ports on your MacBook Pro.
As a bidirectional adapter, it can also connect new Thunderbolt 3 devices to a mac with a Thunderbolt or Thunderbolt 2 port.
In addition, it can be used to connect Thunderbolt-enabled displays — such as the Apple Thunderbolt Display and LG Thunderbolt 2 displays — to any of the Thunderbolt 3 (USB-C) ports on your MacBook Pro. However, using this adapter with an Apple Thunderbolt Display requires a power source, because th
Note: This adapter does not support DisplayPort displays like the Apple LED Cinema Display or third-party DisplayPort and Mini DisplayPort displays.
Compatible with iPad mini, iPad Pro, MacBook Air, MacBook Pro, iMac, Mac Pro and Mac mini with thunderbolt ports