At the time of this writing, Apple’s Thunderbolt adapter was the only one available that allows you to successfully use Thunderbolt 3 devices on a Thunderbolt 1 or 2 port.
New Apple iMac: Thunderbolt, Sandy Bridge and FaceTime HD May 03, 2011 Intel's Thunderbolt: What you need to know (FAQ) - CNET The long and the short of it is that you can get Thunderbolt today, so long as you buy Apple's MacBook Pro, which is the first laptop to ship with a Thunderbolt port as a standard port across its
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Apple's adapter still looks like Thunderbolt to the Mac, so if your application won't work with Thunderbolt, the adapter may be useless to you. to bridge between Apple's underpowered adapter Apple updates the iMac: Thunderbolt I/O, quad-core and more Apple's desktop lineup has typically pushed users requiring plenty of fast I/O towards the Mac Pro - but the latest iMac refresh has broken the tradition. While quad-core Sandy Bridge CPUs and MacBook Pro rumor roundup: Sandy Bridge, Thunderbolt, SSD