Model #: A1790. Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter connects a Mac that has a Thunderbolt 3 port to a device that uses a Thunderbolt or Thunderbolt 2 cable. Use the Thunderbolt port of this adapter to connect your Mac to a display that uses a Thunderbolt or Thunderbolt 2 cable.
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