Reply to s4 Overcurrent on mac?

Hey guys

im new the this community and am in need of your help. i plugged my traktor into my laptop the other day and a error message came up saying usb over current port with be deactivated. so i went and bought a new usb cable incase that was the problem. the same thing happens. i dont know if i should pull apart the s4 and start fault finding for a short or open circuit or fried component, or if its the usb ports on my macbook. if any one else has had this problem and over come it i would love to know about it

sorry about the rant.

Cheers

Chad