lessthanone
Inspired
Im running a 2012 macbook pro with I7 processor and had the same issue with my usb ports. Turns out a few updates ago something happened and killed one of my usb's. Started using the second port and it works fine. You could have a dead usb input
*edit* It is a common issue and here is a thread from apple if you're running 10.10,
https://support.apple.com/kb/PH19094?locale=en_US
*edit* It is a common issue and here is a thread from apple if you're running 10.10,
https://support.apple.com/kb/PH19094?locale=en_US