Transfer between MAC and PC
 

I recently bought a MAC G4 and since AG Satellite has no mac version, I downloaded LimeWire. I wanted to trsnfer the better selection mp3's from my computer to my mac so I connected both to a cable modem, but when they are both online and I do a search the songs from my PC's shared library seem not to exist. So are computers with different versions of the software not compatible to dl mp3's??? an mp3is an mp3, so what is the difference? -ATrueDollFace