[GPSNavX]

So far from Mac there is no simple way to transfer waypoints, routes, tracks to the GPSMap XXXX series. Those units don't support a USB cable. Garmin Homeport from Windows will allow the importation of a GPX file which MacENC can create.

That being said we are working on NMEA2K support for MacENC and I am hopeful we will be able to transfer the data over the N2K network. It is possible to transfer waypoints via a NMEA-0183 connection which your unit supports. Data cable and Keyspan adapter.

I will check with my Garmin contact if the SD card can accept a GPX or KML file with Waypoints, Routes or Tracks. I don't believe so.