Hello,
I have Mac with Mac OS Snow Leopard.
I build red5 successfully on this system.
http://trac.red5.org/wiki/Install
But it is not really necessary, you can download some kind of built
red5 server dmg. I used red5 v0.9.1 final successfully on my Mac, but
I cannot start red5 v1.0RC1. I download it from
http://www.red5.org/red5-server/
Maria