2 Replies Latest reply: Mar 14, 2014 7:32 AM by SeanCota
Kelly Crossley Level 3 Level 3 (710 points)

I've see USB hubs with voltages like 5v, 12v, and 24v being made.


  1. How much power are the USB 2/3 ports on the Mid-2012 MacBook Pro capable of?
  2. Does USB 3 delover more power than USB 2?
  3. How does a USB device regulate the power it gets from the MacBook Pro's USB ports? In other words, what happens if the port is generating 12v of power, but the device only needs 5v?