Minecraft Forums

Quote from TwitterGirl1234

Whenever I try to log in with 1.1.3, I get this: (I'm using a Mac on 10.6.8)


*** MagicMinecraftLauncher 1.1.3 ***
java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2436)
at java.lang.Class.getMethod0(Class.java:2679)
at java.lang.Class.getMethod(Class.java:1605)
at magic.launcher.Launcher.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 5 more

The issue seems to be with the launcher. As a workaround, try adding the following files as mods. They are located in .minecraft/bin/

• lwjgl.jar
• lwjgl_util.jar
• jinput.jar

MagicLauncher is just fantastic. I've been using it for months, it made the mod try-out pretty much simple.

But, my only complaint is that, when I add any mod in "mods" folder, ML automagically adds it in every configuration I've ever created, including those for MC betas, so I'm forced to open every config in the setup and remove the conflicting mod.

Please, I'd be grateful if it were fixed or there were an option to disable it.

Quote from Raithox

Ok so it seems that the newest version doesn't work at all for all macbook users... including me.

Not only in Mac, but Linux as well. I only have Linux machines to test, so could I ask you to try the solution I've found (post above yours), and tell me if it works for Macs as well?

http://pastebin.com/x5GC4X0V

Running on Mac OS X

*** MagicMinecraftLauncher 1.1.3 ***
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at magic.launcher.Launcher.main(Unknown Source)

Can't start at all on a 2013 iMac

I can't get mine to start either!!!!! The developers hate us MACies. If anyone finds a solution please Private Message me.

Quote from DragonBoyDan

This work around works for me.
It's still rather frustrating. But it works so yay.
<edit> Forgot to mention I am running OSX.

What the heck does "This" even mean? Please explain what we need to do.

Quote from Davidjb7

I can't get mine to start either!!!!! The developers hate us MACies. If anyone finds a solution please Private Message me.

What the heck does "This" even mean? Please explain what we need to do.

He's referring to my image:

Quote from Ronjoe

He's referring to my image:

I understand that! But what are you doing in that picture? ANd how can we do it?

Quote from Davidjb7

I understand that! But what are you doing in that picture? ANd how can we do it?

The problem that is occurring is that Magic Launcher isn't loading the lwjgl packages that are required for minecraft to run. This issue only exists in the Mac and Linux versions of the launcher, and seems to be due to a programming error. What I'm doing is forcing these essential files to load.

What I did was add the lwjgl files as mods in the launcher. This mod-adding section can be found by clicking "Setup" in the launcher. Those files come standard with minecraft, and can be found in .minecraft/bin/. You simply add those three files (lwjgl.jar, lwjgl_util.jar, and jinput.jar), and put them at the top of the list (so they load first).

my magic launcher has an error and doesn't let me on

Error:*** MagicMinecraftLauncher 1.0.0 ***
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at magic.launcher.Launcher.main(Unknown Source)

Quote from Ghostmaker94

*** MagicMinecraftLauncher 1.1.3 ***
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at magic.launcher.Launcher.main(Unknown Source)

Can't start at all on a 2013 iMac

Quote from connor4191422

my magic launcher has an error and doesn't let me on

Error:*** MagicMinecraftLauncher 1.0.0 ***
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at magic.launcher.Launcher.main(Unknown Source)

It appears that neither of you have installed Minecraft before. You can install it by using Mojang's default launcher (or play it in-browser). You can do this at minecraft.net.

but I installed minecraft ages ago

Quote from connor4191422

but I installed minecraft ages ago

It'd still be a good idea to double check using the default launcher. If Minecraft doesn't run with that launcher, it won't run on this one. Doing this also helps you figure out whether your issue is because of Minecraft or because of Magic Launcher.

Not working for me either on 2011 iMac. I have the same error.

Hey Ronjoe, I did that and it didn't work. In the same order as you have in your photo too.

Here is my error message

" *** MagicMinecraftLauncher 1.1.3 ***
Restoring disabled mods: mods
Disable inactive mods: mods
Restoring disabled mods: coremods
Disable inactive mods: coremods
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at magic.launcher.Launcher.main(Unknown Source)
Caused by: java.lang.UnsatisfiedLinkError: org.lwjgl.DefaultSysImplementation.getPointerSize()I
at org.lwjgl.DefaultSysImplementation.getPointerSize(Native Method)
at org.lwjgl.Sys.<clinit>(Sys.java:113)
at net.minecraft.client.Minecraft.G(SourceFile:1985)
at net.minecraft.client.Minecraft.main(SourceFile:1559)
... 5 more"

when I load forge it says 1 error and I ignore that and do login and minecraft loads mojang screen. Then I get this crash

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: co.uk.flansmods.common.FlansMod
at cpw.mods.fml.common.LoadController.transition(LoadController.java:142)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:513)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:160)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:411)
at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:733)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.ClassNotFoundException: co.uk.flansmods.common.FlansMod
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:238)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:56)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:249)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:425)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:165)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:98)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:503)
... 5 more
Caused by: java.lang.NullPointerException
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:227)
... 32 more
--- END ERROR REPORT 41c42b6b ----------


I was ONLY loading forge universal build .691
I was at ONE point trying to get Flans mod and Mr Crayfish's Furniture mod loaded.
Help please. Tell me if Crash report is not enough (or too much)

Can someone with a Mac who has the "LWJGL not found" problem check if the following works:

1. Get the new 1.6 launcher from: http://mojang.com/20...napshot-13w19a/
2. From the 1.6 launcher download and start Minecraft 1.5.2, then close it and close the launcher
3. Start the Magic Launcher 1.1.3, in Setup select Environment = 1.5.2 (it automatically selects the 1.5.2.jar) and test if it runs

If Magic Launcher can start 1.5.2 in this way, then the Mac fix will be easy.