Cmd + Space: start typing System Profiler
Or find it from Mission Control
or:
- Click the Apple icon located in the top left-hand-corner of the screen
- SelectAbout This Mac.
- Then select System Report.
- System Profilerwill open up.
- SelectUSBlocated underHardwarein the Contents column on the left side of the window.
- If you have USB 3.0 ports, youll see a USB 3.0 selection.
This example Mac only has USB 2 ports.
See further info in this Apple Support Article:
Identify the ports on your Mac
Check the physical ports on your computer:
- If you see ablue USB port, its USB 3.0.
- It may also be marked on the outside of the port with eitherSS or 3.0.