Mac [solved] FTB not working on Mac

[Justin Chang]

Hello, all.

I wanted to run Feed the Beast on my Mac, but I got an error when I tried running a modpack. This is the first time I have played FTB on this Mac, I am running version 10.8.5 of Mac, and I am trying to run the YogCraft Modpack.

I entered in my account info, and the launcher got stuck on a window that said 'Downloading Minecraft...'. A error appeared in the console. The console log can be found below or at this link or found below:

mc = class net.minecraft.client.Minecraft
[10:17:56] [ERROR] ClassLoader.checkCerts:806->MinecraftLauncher.main:217: Unhandled error launching minecraft: java.lang.SecurityException: class "md"'s signer information does not match signer information of other classes in the same package
java.lang.ClassLoader.checkCerts(ClassLoader.java:806)
java.lang.ClassLoader.preDefineClass(ClassLoader.java:487)
java.lang.ClassLoader.defineClassCond(ClassLoader.java:625)
java.lang.ClassLoader.defineClass(ClassLoader.java:615)
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
java.net.URLClassLoader.access$000(URLClassLoader.java:58)
java.net.URLClassLoader$1.run(URLClassLoader.java:197)
java.security.AccessController.doPrivileged(Native Method)
java.net.URLClassLoader.findClass(URLClassLoader.java:190)
java.lang.ClassLoader.loadClass(ClassLoader.java:306)
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
java.lang.ClassLoader.loadClass(ClassLoader.java:247)
java.lang.Class.getDeclaredFields0(Native Method)
java.lang.Class.privateGetDeclaredFields(Class.java:2339)
java.lang.Class.getDeclaredFields(Class.java:1770)
net.ftb.mclauncher.MinecraftLauncher.main(MinecraftLauncher.java:185)

Any help would be appreciated. Thanks!

 

[Ashzification]

Just an FYI, when you post a thread on the forums, usually I don't answer tickets that are carbon-copies of the thread.
I've sent my reply via the help desk. Please continue with either this thread or the ticket on the help desk, not both.

 

[Justin Chang]

Thanks, I just reinstalled the launcher and it worked.

 

[AlanEsh]

Maybe change your thread title to include [Solved]