Intermittently, I have been having issues with the USB ports on my Early 2008 Mac Pro (3, 1). I start up the computer, and none of the USB ports work - a pop up windows says that it is searching for bluetooth keyboard/mouse because none are connected. Sometimes, I can unplug and replug the USB keyboard a few times and it will somehow start working. I've also noticed the issue with the USB ports on my Cinema display (at first I thought the ports on the display were not working, but I think it's that the computer's were not). The only USB devices I have connected are: - Cinema display - iPhone charger - Keyboard - Mouse I've noticed if I unplug the display, it seems to get better. But I can't imagine that those 4 USB devices were be too much power for a Mac Pro. Is there anything else I can do to diagnose this or hopefully resolve it? I do not think it's an issue with the keyboard mouse because when the keyboard doesn't work, none of the USB devices work. I am using OS Maverick.