GPSMac is a simple GPS management and mapping application for Mac OS X.
What's new in GPSMac
Version 0.3:
Enhancements
Added USB, and more specifically Garmin Forerunner 305 support.
Added a track graph for plotting elevation, heart rate and speed over time or distance.
Added GPS driver descriptions to Transfer Preferences.
Geometry and position of the main document window, the map window and the GPS tracking and inspector windows are now autosaved and restored between sessions.
Improved serial port code (writes should be somewhat faster).