This is the only way I can connect my mac to my Garmin Vista C... when it works, it is wonderful. I also use it to convert my GPX files from geocaching.com to text and print a booklet to take with me.

It does, however, crash fairly frequently, preventing me from giving it a full 5-star rating.

Overall, an outstanding effort - especially considering Garmin provides third-parties with no info about their USB protocol and offers no mac drivers. Fix the crashes and this will be a wiinner!