Thunderbolt technology supports fast data transfers with two independent channels of 10Gb/s each. And Thunderbolt 2 technology can bond the two channels for a superfast 20Gb/s. Use this cable to connect Thunderbolt-enabled devices to the Thunderbolt or Thunderbolt 2 port on your Mac.
The Apple Thunderbolt Cable lets you connect a Thunderbolt-equipped system to a Thunderbolt device. Connect a Thunderbolt-equipped Mac in target disk mode to another Mac for fast data access or system migration, or network two Thunderbolt-equipped computers.
Apple Thunderbolt Cable