Also have a Macintosh. Have been thinking a ling time about software. Don't really know much about but 'kickstarted myself' today.
Just bought a version of GPSy. It is GPS software specific for Macintosh. I've seen the demo and for what I read about it it looks very usable and stable.
They also sell the cable you need to connect the unit to your computer (macintosh USB).
Check the website for more info:
Now I am franticly searching around the web for usable maps. I hope to make the route for my next trip on my Ibook, then upload it to my Garming III+
Afterwards I wonna download any waypoints and tracklogs from my GPS onto my Ibook.
I am wondering. If I get the software and connect the III+ with my Ibook. Will I then be able to use the base map of my III+ on my Ibook? That would be a start.
To be able to use the software (indicate waypoints, make a route,...) I first need to find some decent digital maps.
If I have to buy them where should I look? I am hoping to use the maps to plan my trip around the Baltic sea. I am not aiming for paved road, so I will need quite some detail so that I can find gravel roads and tracks.
Any advice more then welcome.