Macbook Pro Retina USB for iPhone 6 not working

I have a MacBook Pro Retina 13" with El Capitano (10.11.1) that I bought in March. When I plug in my iPhone 6 with the thunderbolt cable the following message prompt is displayed as a notification:

"USB Devices Disabled: Unplug the device using too much power to re-enable USB devices"

I've tried restarting the computer with the device attached, which worked when I had issues with using an external hard drive, but nothing happened this time. I've tried different cables, having the power adapter attached to the computer, my iPad, and other people's iPhones, but none show up. Please send help!!

Thanks,

Daniel