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 Thunderbolt/USB 4 or Thunderbolt 3 (USB-C) port on your Mac. Because it's a bidirectional adapter, you can also connect Thunderbolt 3 devices to a Mac with a Thunderbolt or Thunderbolt 2 port and macOS Sierra (or later). You can also use it to connect Thunderbolt-compatible displays (such as the compatible with Apple Thunderbolt Display and compatible with LG Thunderbolt 2 displays) to any Thunderbolt/USB 4 or Thunderbolt 3 (USB-C) port on your Mac. Note that you'll need a power source when using the adapter with an compatible with Apple Thunderbolt Display, as the display doesn't pass power through the adapter. Note: This adapter does not support DisplayPort displays such as the compatible with Apple LED Cinema Display or third-party DisplayPort and Mini DisplayPort displays. Compatibility with MacBook Air models: MacBook Air (M2, 2024), MacBook Air (M1, 2020), MacBook Air (Retina, 13-inch, 2020), MacBook Air (Retina, 13-inch, 2018-2019) Compatibility with MacBook Pro models: MacBook Pro (13-inch, M2, 2024), MacBook Pro (13-inch, M1, 2020), MacBook Pro (13-inch, 2020, four Thunderbolt 3 ports), MacBook Pro (13-inch, 2020), MacBook Pro (14-inch, 2021), MacBook Pro (16-inch, 2021), MacBook Pro (16-inch, 2019), MacBook Pro (13-inch, 2016-2019), MacBook Pro (15-inch, 2016-2019)