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 two Thunderbolt-equipped Macs in either Target Disk Mode: one Mac appears as an external HD, Thunderbolt Connection Mode: two Macs form a network across the Thunderbolt cable, or
Target Display Mode: an iMac appears as an external display for a MacBook Pro or a MacBook Air.