Last week, Garmin released beta versions of their Macintosh applications to support their GPS units.
They have five parts to their support.
Bobcat, which provides these capabilities:
MapInstall, which installs maps onto your Garmin USB GPS devices and SD card readers.
MapManager, which copies maps and unlock codes into the right place to be accessible by Bobcat and MapInstall.
MapConverter, which converts Windows PC maps for migration to the Mac.
POI Loader, which is free software for your computer that lets you upload customized POIs to your compatible Garmin unit. POI Loader does not create customized POIs, nor is it software for your Garmin GPS. It simply gives you the ability to upload POIs created by others from your computer to your compatible Garmin — making it easy for you to navigate directly to these points of interest.
If you are Macintosh user and you have a Garmin GPS, I suggest you checkout Garmin's Apple-Mac Blog.
I enjoy my Garmin setup: