Don’t worry. Many of us will never buy a Mac after their insulting “I’m cooler than you” commercials. They can go be cool all they want, but not with my money.
Try bringing up movie maker as if the device has been recognized and do a capture anyway. The device manager may see it but not pop up a dialogue that asks what you want to do. Instead of waiting for a dialogue when you plug in the firewire, just assume the OS sees it and start a capture anyway from an already started movie maker or your favorite capture program manually.
No problem, but if you seriously edit any kind of video content...doing it on a MAC is a welcome relief after the clusterf@*k experience of trying to do it on a Windbowz machine.