Once it's installed, make sure everything is located inside a sub-folder, maybe on your desktop. (Some OSX users are getting permission issues when things are in the new Applications folder). Then open a Terminal window, by launching Terminal from the Apps/Utilities folder. You now have a command line on your Mac. Don't panic - just find the blank-icon file called "LimeWire" in the installed folder and drag it onto your terminal window, then press return. This should automatically generate a pathname to tell the kernel where to launch Lime. It will take a minute or so, then you'll get a JAVA program that actually ran pretty well for me. You will have to do this everytime, I think, unless someone posts a way to make the LimeWire file self-launching. Takes more Unix-ese than I know.