Use first-generation Thunderbolt and Thunderbolt 2 devices with your new Thunderbolt 3 computer

With this adapter, you can connect Windows and Mac based Thunderbolt 3 computers to older Thunderbolt devices, such as external hard drives, Thunderbolt displays, and older Thunderbolt capable Mac computers.

Because this adapter is backward compatible, you can connect to first-generation Thunderbolt devices at 10Gbps speed. With Thunderbolt 2 devices, you can connect at 20Gbps. The adapter satisfies all requirements for bi-directional data transfers and simultaneous power for bus-powered devices.

Your computer’s Thunderbolt 3 ports might not function properly until you update one or more of the following on your computer:
BIOS
Thunderbolt firmware
Thunderbolt 3 controller drivers
Thunderbolt 3 software
The required updates will vary depending on your computer.

For an up-to-date list of affected computers and instructions, visit http://thunderbolttechnology.net/updates. If your manufacturer isn’t listed on the Thunderbolt website, contact your manufacturer.