There are two general kinds of video capture available to Macintosh owners.
Connectix / Logitech QuickCam cameras can be used with almost any Mac and they're easy to setup and use.
If you want to use a quality color video camera with SiteCam, you'll need to have a digitizer. Many Macintosh computers have a built-in video digitizer. If you're not sure if your Macintosh has a video digitizer, check the computer's manual or just look for a yellow RCA video-input jack on the back.
3rd party video capture cards:
We do not recommend any digitizers in particular, but usually any Macintosh with built-in video capture will work well.