RouteBuddy is a GPS mapping application for OS X. All the essential functions of your GPS device are supported; all you need is a Mac, a GPS, and of course RouteBuddy.
Supports road and topographic maps
Supports USGlobalSat, Garmin, TomTom, and NMEA Devices
Find and navigate to an address or feature
Transfer Waypoints, Routes and Tracks.
Starts with lousy, uninformative web site and then goes downhill.
No instructions about restrictions in the canned demo map.
Save you time and certainly, save you money.
Plan you trips on Google Maps, then simply take a picture of the map and you have all you need saved on your phone. Ta-Da no cost, good map, no slogging through a poorly supported site/product.