USB Issue with DDJ400

I've been using my controller with my Macbook for 3 years 2-3 days a week. The other day I bought new music and when I plugged in my controller it said, I am drawing too much power from the USB and it doesn't work? Any idea whats happening. I cant get it to work. I get a prompt that says unplug the device drawing too much power.

Any advice?

KK