Users note various problems with USB devices after updating to Mac OS X 10.4.7, particularly a situation where devices must be unplugged then re-connected in order to be recognized, or devices take an ...

If only one USB device is not working, try plugging in another USB device to see if it is recognized. If other devices work, the issue may be with the original USB device rather than the port itself.

There's nothing more frustrating than your computer suddenly saying it can't recognize the USB device connected to the port. This is especially true when you're urgently trying to transfer a file to a ...