Connecting with a high-performance Gigabit Ethernet network is a breeze with the Apple MMEL2ZM/A Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter. This white adapter is small, compact and easy to use. It easily connects to Thunderbolt port on your Mac computer and offers an RJ45 LAN interface. The Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter lets you connect Thunderbolt and Thunderbolt 2 devices such as external hard drives and Thunderbolt docks — 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 and macOS Sierra or later.
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 the display does not provide power through the adapter.