The Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter lets you connect Thunderbolt and Thunderbolt 2 devices to any of the Thunderbolt 3 (USB-C) ports on your MacBook Pro.

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) / USB 4 ports on your Mac. However, using this adapter with an Apple Thunderbolt Display requires a power source, because the display does not provide power through the adapter.

Features:

1. The Thunderbolt 3 to Thunderbolt 2 Adapter lets you connect Thunderbolt and Thunderbolt 2 devices Thunderbolt displays.
2. for example — to any of the Thunderbolt 3 (USB-C) ports on your 2016 MacBook Pro As a bidirectional adapter, it can also connect new Thunderbolt 3 devices to a Mac with a Thunderbolt or Thunderbolt 2 port.
3. OS Requires : macOS Sierra.(window cannot work)
4. The adapter only work for new macbook pro with Mac IOS Sierra, cannot work for windows. 3.
5.  The adapter does NOT duplicate the functionality of the Thunderbolt ports on MacBook Airs and legacy MacBook Pros when daisy-chaining accessories together.5.
6. The adapter can’t work for the PC with Type-C port.