Please remember that you use this software at your own risk.  Further details of usage in readme.txt

Mac Users

The files are .zip files, to install once downloaded, double-click in the Finder to produce a .gmapi file. If you now double-click the .gmapi it will run another Garmin app called MapManager which came with Bobcat from memory, which puts the maps in the right place for Bobcat to use them. If you don't have MapManager all it seems to do is copy the .gmapi file to the right place, which is

/User/"you_user_name"/Library/Application Support/Garmin/Maps

and rename the file to have a .gmap extension.

Shonky Full

Shonky Large

Shonky Topo Without

Shonky Transparent