This is what it output
Checking for Minecraft launcher (minecrafterr.jar) in /Users/ashleyhughes/Library/Application Support/minecraft/minecrafterr.jar
Minecraft launcher found!
Starting launcher...
Exception in thread "main" java.lang.NoClassDefFoundError: Support/minecraft/minecrafterr/jar
Caused by: java.lang.ClassNotFoundException: Support.minecraft.minecrafterr.jar
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Error report complete.
Here's my guess as to what went wrong:
Hm, I can't seem to figure it out.
If your client failed to load press Paste Error and show that link to #Risucraft on esper.net
Posting to pastebin.com...
http://pastebin.com/VCjf1DKq