Chimoosoft - Terrabrowser is a program for Mac OS X to browse images from the USGS/Microsoft Terraserver. It also supports Garmin and NMEA connections to GPS receivers.
Chimoosoft's GPS Connect for Mac OS X is a freeware program which connects to Garmin GPS receivers and allows upload and download of waypoints. NMEA Protocol is also supported for other brands of GPS receivers.
GPSBabel converts waypoints, tracks, and routes between popular GPS receivers and mapping programs. It also has powerful manipulation tools for such data.
GPSy -- Macintosh GPS Communications. GPSy is the only Macintosh GPS program compatible with
any NMEA-0183 compatible GPS/Loran-C/DECCA or other navigational system.
RouteBuddy is a GPS enabled mapping application for OS X. All the essential functions of your GPS device are supported; all you need is a mac, a Garmin GPS, and of course RouteBuddy.
GPS software for Apple Macintosh and Garmin GPS units. With link2GPS you can transfer waypoints, tracks and routes between a Garmin GPS unit and an Apple Macintosh computer. With TopoDraw you can draw waypoints and tracks on a map and uploa...