I would recommend an analog to DV converter box of some kind. I'm aware of three made by Power R, Sony, and ForMac and all three are between $300 and $400. Basically, you plug the yellow red and white RCA analog outputs on your camera to one of these boxes, and the box converts it to a DV stream and sends it over a FireWire cable into your Mac.
I just made a post asking for opinions about the video quality between the three, so you may want to see if anyone has a recommendation.