How to open white night on a mac?

[willochill]

I have a mac snow (snow leopard) and i downloaded white night. I brought the folder into the common/amnesia the dark descent folder and clicked on the .bat file, but it says "the application is installed in a virtual machine that cannot be located." i have no idea whatsoever on how to open it so please help?
also i dunno if this is related but right before i started downloading white night i had deleted a virtual machine in parallels 7 from my computer (i don't have any parallels machines running anymore), and the icon for white night.bat showed the little parallels symbol under it, idk if that has something to do with the problem or not.