MBP 13" Early 2011 Thunderbolt Firmware Version - How to update 22.1 to latest version I bought a Kanex KTU10 to add USB 3.0 support on my machine because its only on USB 2.0. The product said my machine can support the product but when I plug it in it didn't work, while Mini DP to HDMI can work.

Kanex support told me to update my firmware but I am on MacOS Sierra now how do I update my Thunderbolt Firmware on my OS version? Image below is the information of my Thunderbolt.
Since you're on macOS Sierra you should already have the latest firmware version compatible with your MBP.

As far as I know, the only firmware update for your MBP was issued about five years ago. For more info, refer to About EFI and SMC firmware updates for Intel-based Mac computers.