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This Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter allows you to connect Thunderbolt and Thunderbolt 2 devices (such as external hard drives and Thunderbolt docks) to any Thunderbolt 3 (USB-C) / USB 4 port on your Mac.
As a bidirectional adapter, it also enables newer Thunderbolt 3 devices to connect to Macs with Thunderbolt or Thunderbolt 2 ports running macOS Sierra or later.
Additionally, this adapter can be used to connect Thunderbolt-enabled displays (such as the Apple Thunderbolt Display and LG Thunderbolt 2 displays) to any Thunderbolt 3 (USB-C) / USB 4 port on your Mac. However, when using this adapter to connect an Apple Thunderbolt Display, the display cannot receive power through the adapter, so an external power source is required.
Note: This adapter does not support DisplayPort displays, such as the Apple LED Cinema Display or third-party DisplayPort and Mini DisplayPort displays.