(I'm the other Minecraft Automap dev)
I recently found a way to build this to run on a Mac. The version I have right now is extremely buggy and the static map and options pages aren't working at all, but what was once deemed impossible may now be possible. If there is enough interest I may go ahead and finish this port. How many people need a Mac version? Linux may technically be possible as well but there would have to be a great deal of interest for me to mess with it.