CAD software for the Mac

Hello All,

I am a newbie to CAD/CAM and CNC. Does anybody have any
recommendations for CAD software to run on the Macintosh? I am
running OS X (unix based).

I read a little bit about a program called Q-CAD but have been unable
to find recent versions for the MAC. Does anyone have any experience
with Q-CAD?

Thanks in advance,
Alan