I\'m aware of this question: How to add Compass syntax support to Jetbrains PhpStorm? but it doesn\'t help.
I just opted for copying the files over, much easier in my pr
If it helps anyone - on Snow Leopard, compass is installed in the following directory (obviously version numbers in the path depend on the installed version):
/Library/Ruby/Gems/1.8/gems/compass-0.12.2/bin/compass
So for the Program: option you can select it there.