With the Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter, you can connect Thunderbolt and Thunderbolt 2 devices - such as external hard drives and Thunderbolt docks - to any Thunderbolt 3 (USB-C) or USB 4 port on your Mac.
It also works in reverse, so you can connect new Thunderbolt 3 devices to a Mac with a Thunderbolt or Thunderbolt 2 port and macOS Sierra or later.
- Thunderbolt 2
- Thunderbolt 3 (USB-C)
- USB-C