i received the card on thursday, may 18. The card is "recognized" in the desktop toolbar but that's about it. It's not in system profiler nor is it able to mount any external,powered harddrives. I sent a tech request thursday to firewiredirect.com (the "seller" for this card) but as of today, Monday, May 22, have received no reply. I'm pretty disappointed so far but hopefully it will work out. I'd hold off on buying this card at the moment. If the person who has it working would explain exactly how he/she got it to work, I'd appreciate it. Even when i start or boot the machine with the card plugged in, it doesn't work. As mentioned by another poster, there's no documentation with the package so it's pretty much "flying by the seat of your pants" kind of thing with it.