Checking if a Mac Has High-Speed USB 2.0
In general, Macs that were introduced after June 2003 are equipped with Hi-Speed USB 2.0, so you should only really be concerned about this if you have a very old Mac or PC. Please see our system requirements page for a list of Macs that have High-Speed USB 2.0.
To check your system, choose "About This Mac" from the Apple menu, and click on "More Info". Choose "USB" from the "Hardware" section of System Profiler. If your Mac has USB 2.0, you should see an entry for "USB High-Speed Bus" in the "USB Device Tree" list.