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Note that this also pertains to USB-C. This has been a personal nightmare on the new MacBook Pros.

• ajross 9y ago
  That's because USB Type C is just a connector standard for a cable containing (among other things) a standard set of USB 2 and 3 signals.
  • digi_owl 9y ago
    Indeed. What most people refer to as USB-C is a combo of three, highly optional(!), specs. The first is the C plug spec. The second is the USB 3.1 protocol and cable spec. The third is the USB power delivery spec. All of these can be mixed and matched as the OEM sees fit.
    • pat2man 9y ago
      You forgot thunderbolt 3...
      • digi_owl 9y ago
        That one is outside of the main USB specs, piggybacking on the Alternate Mode part of the wiring spec...