Originally Posted by Cinema Liver

Hi there. i normally like to stand up to my problems and face them head on, but eventualy you have to admit when you have been beaten, and my HacFirewire just beat me REALLY badly. I have spent the past three days trying to get the firewire to work, I have installed every kext, followed every guide, and so far nada. so over to you, can anyone help?

I am running a Shuttle SG31G2 which has built in Firewire (front and back). There is no hardware issue with the firewire itself as it works perfectly under Windows 7 where it shows up as TEXAS instruments 1394 OHCI compliant host controller.

Under Mac OS however, when I look at FireWire in System Profiler, I see this "Unable to list FireWire devices."
When I check the logs I see "FireWire GUID ffffffffffffffff is invalid!"

I don't know if this is significant, but in System Profiler, two FireWire related extensions are listed, IOFireWireFamily & IOFireWireIP.

However in the actual folder there are more IOFireWireAVC, IOFireWireSBP2 & IOFireWireSerialBusProtocolTransport (there is also AppleFWaudio in there somewhere.) None of those items show up in System Profiler.
I tried "sudo kextload -t /System/Library/Extensions/IOFireWireAVC.kext" but it did nothing.

I am really afraid of this one. Last night in my attempts to fix this problem I found a thread which suggested using USB fix to correct the problem. I installed it and my system refused to boot, I had to wipe the drive and start again.

I built this system for video editing, so Firewire is an important part, but solving this is just way beyond my skill level. So does anyone have any suggestions?

Thanks in advance.