Getting started
"Firstly make sure you have a memory card installed in your device, unless it is a product like N95-8GB with built in memory. Run the Maps application on your device. Once you have done this, you can connect your device to your internet connected Mac using your USB cable. If you are using Nokia Multimedia Transfer to transfer music etc, it is best to wait for this to finish transferring. Then launch Map Loader for Mac. You can then drag and drop various maps elements such as countries to your device. And the history feature? Well not groundbreaking, but it lets you see what you have transferred, and you can use it to reload the same set of maps as a later date."
For more, read on at Nokia Beta Labs....
And Darla's got some screenshots of it running on her Mac here...