I run OS X and it could be better if I knew what OS the program or a game are for, before I download it, and it might not work because its for PC use only. Could there be a own colum that specify what OS the program are for? Like in Kazaa. This really frusturates me and takes a long time! Can anyone help me? Give some tips for example

Files and applications meant for a Mac would usually end in .sit for a StuffIt archive, or perhaps .sea for a self extracting version. .dmg is another option, mainly for OS X, that means Disk Image. ZIP archives, on the other hand, very rarely contain Mac apps, and .exe files are strictly from the Windows(or perhaps DOS) world.

That said, I've never done an application search in LimeWire. Downloading music that no one plays on the radio doesn't bother me, and videos that aren't for sale or don't exist off the Internet don't bother me, but software piracy does, particularly Mac games, since I know the names of most of the prominent Mac game programmers and read their posts on forums like this. But that's up to you.