So I am running OS X Mountain Lion and I downloaded the server file, but when I look to see the next steps online, people keep mention the StartServer.sh file, which appears to me to be included in the download. However, when I download the server file, all I get when I unpack it are the config, jar, coremods, lib, mods, the 1-10GB bat files and a server.properties. So my question is, how do I find this file, or if it has to be made, how do I go about doing so?