Mac users have come a long way from the bad old days when there was barely ANY commercial software available, but there is still often some lag in some of the more esoteric non-commercial software that we can use. For instance, PC-based cachers love to tout the amazing use and flexibility of GSAK, the Geocaching Swiss Army Knife, but there is NO Mac version. We Mac users have to rely on websites, and workarounds to do a lot of that work. One of my favorites for that is MacCaching, a cache management software that will load PQs to GPS devices, create cache lists, help you sort by type, D/T ratings, etc. Its an invaluable tool for the cacher who uses a Mac.