installing greylisting on OS X intel

Hello,

Does anybody know how to install Greylisting on an OS X intel machine?
I haven't found any documentation on it and I have run into a wall  
trying to get it started.
I'm thinking it won't start because the one I'm using is not compiled  
for Intel.
I'm open to ideas, so if you don't know exactly how to do it, I can  
still give some suggestions a try.

Thanks
~Francis