Seriously, I just received this awesome HJ-720ITC and thought it would be awesome because I could upload the data to my computer to help me keep track! Fooled! I have a Mac and they don't have software for it. I e-mailed the company. We'll see what they say. Part of the reason we paid extra for this model is because it would download to the computer!
Let me echo the general comments too. I am purchasing a pedometer now. This one _was_ the top of my list until I read about the lack of support for Macintosh or Linux. I will be purchasing a different pedometer from another manufacturer until Omron gets a clue. And I will recommend that all of my other contacts do the same.
C'mon Omron! It can't be THAT difficult to crank out a Mac version. You've got a great product here. Take a look at the 20-50 year old fitness nut. They are often Mac users who buy gadgets (otherwise they would have bought a PC!). I still can't believe that there isn't Mac version available after all of this time.