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HT1151: USB and FireWire Quick Assist

Learn about USB and FireWire Quick Assist

HT1151 Why did my firewire port stop working?

450 Views 1 Reply Latest reply: Nov 26, 2012 8:19 PM by BDAqua RSS
Jerry Harned Calculating status...
Currently Being Moderated
Nov 26, 2012 6:54 PM

I have had my power mac for about 2 years. I use the Firewire 800 port all the time. Tonight 3 devices that I plugged in to it via 3 different cables did not work or show up in the finder. The system profiler said, " Warning: Unable to list Firewire devices".

Mac Pro, Mac OS X (10.6.8)
  • BDAqua Level 10 Level 10 (114,705 points)
    Currently Being Moderated
    Nov 26, 2012 8:19 PM (in response to Jerry Harned)

    HI Jerry, try this...


    reset FW bus, same goes for USB reset...

    Reset the Firewire bus

    If your Firewire or USB isn't recognizing any device.  A solution which has worked for some whose hard drive became invisible in 10.4 was simply to follow these four steps to reset the Firewire/USB bus:

    1. Shut the machine down.

    2. UNPLUG the power lead to the computer and any firewire/USB drive.

    3. leave it for 10 minutes.

    4. Connect back up and reboot.


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