Garmin came out with a new (since 2009 :) line of products, called BaseCamp. The good part is that this product has a Mac version as well as a Windows version. Mapsource was only windows.
Now the question arises: what do you need for proper mapping under OS X?
1. Install BaseCamp from Garmin (free)
2. Download MapConverter for Windows (free), install
3. Run MapConverter
- it will you which maps are Mac compatible already (any recent map will be)
- it will offer to convert the others to Mac format
4. For those need converting: provide folder, press next, next, finish. Copy them to the media being read by your Mac
5. For those already compatible: simply copy them to the media you want to exchange them on with your Mac
6. Download and install Garmin Map Manager for MAC
7. Open Map Manager, select folder where your converted or copied maps are, select your maps one by one
8. Copy your GPX and GDB files over, BaseCamp can open those for you
Enjoy :)
