Hey. I run a mac. I puth the secret rooms mod jar into the mods folder and clicked play. Thiss is what happened. After looking at other posts i updated my java. it still says i have 1.60.06 or something. Pls help.---- Minecraft Crash Report ---- // Hey, that tickles! Hehehe!  Time: 10/21/13 6:43 PM Description: There was a severe problem during mod loading that has caused the game to fail  cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: com.github.AbrarSyed.secretroomsmod.common.SecretRooms 	at cpw.mods.fml.common.LoadController.transition(LoadController.java:149) 	at cpw.mods.fml.common.Loader.loadMods(Loader.java:519) 	at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:183) 	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:472) 	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:807) 	at net.minecraft.client.main.Main.main(SourceFile:101) 	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 net.minecraft.launchwrapper.Launch.launch(Launch.java:131) 	at net.minecraft.launchwrapper.Launch.main(Launch.java:27) Caused by: java.lang.ClassNotFoundException: com.github.AbrarSyed.secretroomsmod.common.SecretRooms 	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186) 	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:59) 	at java.lang.Class.forName0(Native Method) 	at java.lang.Class.forName(Class.java:249) 	at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:462) 	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:313) 	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.sendEventToModContainer(LoadController.java:194) 	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:174) 	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:313) 	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:105) 	at cpw.mods.fml.common.Loader.loadMods(Loader.java:509) 	... 10 more Caused by: java.lang.UnsupportedClassVersionError: com/github/AbrarSyed/secretroomsmod/common/SecretRooms : Unsupported major.minor version 51.0 	at java.lang.ClassLoader.defineClass1(Native Method) 	at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) 	at java.lang.ClassLoader.defineClass(ClassLoader.java:621) 	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) 	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:178) 	... 38 more   A detailed walkthrough of the error, its code path and all known details is as follows: ---------------------------------------------------------------------------------------  -- System Details -- Details: 	Minecraft Version: 1.6.4 	Operating System: Mac OS X (x86_64) version 10.8.5 	Java Version: 1.6.0_65, Apple Inc. 	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc. 	Memory: 45113744 bytes (43 MB) / 136269824 bytes (129 MB) up to 1065025536 bytes (1015 MB) 	JVM Flags: 1 total; -Xmx1G 	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used 	Suspicious classes: FML and Forge are installed 	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 	FML: MCP v8.11 FML v6.4.20.916 Minecraft Forge 9.11.1.916 5 mods loaded, 5 mods active 	mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed 	FML{6.4.20.916} [Forge Mod Loader] (minecraftforge-9.11.1.916.jar) Unloaded->Constructed 	Forge{9.11.1.916} [Minecraft Forge] (minecraftforge-9.11.1.916.jar) Unloaded->Constructed 	TooManyItems{1.6.4} [TooManyItems] (minecraft.jar) Unloaded->Constructed 	secretroomsmod{4.6.2} [The SecretRoomsMod] (SecretRoomsMod-universal-1-1.6.4-4.6.2.309.jar) Unloaded->Errored