Check out: macgpspro.com Their software worked just fine with my Garmin 60c about a year ago when I was actively kayaking in Monterey Bay. It's been a year so I probably couldn't be much help now, but that's where I got the cables to connect to my Mac with USB and the software to up and download stuff. Check them out. The do updates every couple of months for free, too. I even got a personal e-mail response to a question once from Dr. James, the head (and maybe the only) guy. I 'spect this is a limited market and he might be the only one programming this but he does a good job. Fair winds and happy bytes, Dave Flory, San Jose, CA., and Flower Mound, TX. -- Speak softly, study Aikido, & you won't need to carry a big stick! See my photos @ <http://homepage.mac.com/dflory>