Hi,
I work for JVC and would like to try and help.
All of our traditional HD camcorders work great with MAC. As one other poster indicated, most brands these days--including JVD--record AVCHD, which will be fine with any newer MAC that has an Intel processor. With the new iMovie, these JVC cams are pretty much Plug n' Play.
Also, the new 2011 HD cams just started shipping and we now are the first brand with a 40X Optical Zoom on an HD camcorder. Definitely worth checking out, and many models available for under $400.
Chris