The Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter lets you connect Thunderbolt and Thunderbolt 2 devices (like external hard drives and Thunderbolt docks) to any Thunderbolt/USB 4 or Thunderbolt 3 (USB-C) port on your Mac. As 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 (like Apple Thunderbolt Display and LG Thunderbolt 2 displays) to any Thunderbolt/USB 4 or Thunderbolt 3 (USB-C) port on your Mac. Please note that you will need a power source when using this adapter with an Apple Thunderbolt Display, as the display does not transfer power through the adapter. Important Note! This adapter does not support DisplayPort displays such as the 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)