I've been using the aruduino duemilanove on my mac book pro and then after a few days my usb ports stopped working. I had been using a external power source with the arduino: an AC adapter input:120VAC /Ouput12VDC
I changed computers. I used a friends macbook and then after a day I had the same problem. the usb ports stopped working. I reinstalled my computer and reset the PRAM everything else I read about on the mac forum about the usb ports. Nothing...
Could the AC power have fried my usb ports??