I have a mac and when ever I try to open the minecraft-server.jar it says "The Java JAR file minecraf-server. jar could not be launched. Check the console for possible error messages." The console says "[0x0-0x70070].com.apple.JarLauncher [1589]: SystemFlippers: didn't consume all data for long ID 0 (pBase = 0x100110120, p = 0x100110124, pEnd = 0x100110128)". I am a simple man when it comes to computers so I don't know a whole lot about advanced computer workings. Please help. Many thanks.