Forge Mac Error Help

[LogicFail]

I'm Trying To Install A Java Jar File But Every Time I Open It It Comes Up With The Error "Could Not Open Java Jar File Check Console For Errors.."

Console However Isn't Showing Anything Although I Set My Java Settings To Allow Logging, So I Tried Running It Thru Terminal And I Get This Error:

 

We appear to be missing one or more essential library files.

You will need to add them to your server before FML and Forge will run successfully.java.lang.ClassNotFoundException: net.minecraft.launchwrapper.Launch

  at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)

  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

  at java.lang.Class.forName0(Native Method)

  at java.lang.Class.forName(Class.java:348)

  at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:25)

  at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:12)

[LexManos]

Use Forge's installer.