Whenever I install this mod and open minecraft, it loads to the mojang screen, then crashes. I am using the latest version of forge for minecraft 1.6.4. The crash report is as follows. I also have the RivalRebels mod installed. If anybody could help me, I would really appreciate it.

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 12/22/13 2:13 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.dayzminecraft.dayzminecraft.DayZ
at cpw.mods.fml.common.LoadController.transition(LoadController.java:156)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:521)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:183)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:473)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:808)
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.dayzminecraft.dayzminecraft.DayZ
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:61)
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:201)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:181)
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:112)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:511)
... 10 more
Caused by: java.lang.UnsupportedClassVersionError: com/github/dayzminecraft/dayzminecraft/DayZ : 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: 46980352 bytes (44 MB) / 123351040 bytes (117 MB) up to 1069416448 bytes (1019 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 v6.4.45.953 Minecraft Forge 9.11.1.953 5 mods loaded, 5 mods active
mcp{8.09} Minecraft Coder Pack Unloaded->Constructed
FML{6.4.45.953} Forge Mod Loader Unloaded->Constructed
Forge{9.11.1.953} Minecraft Forge Unloaded->Constructed
DayZ{8.10.10} DayZ Minecraft Unloaded->Errored
RodolRivalRebels{1.6.4} [RivalRebels](RivalRebels %282%29.zip) Unloaded->Constructed

Yes, that error is due to you using java 1.6, DayZ needs 1.7.

Wow...looks like we are having the same issue, and looks like you have a Mac as well. I think it might have something to do with the Apple Java version. I will followup and let you know if I find anything that works!

Ok, thanks!

I just downgraded DayZ to 1.6 which should fix the errors.

My solution: After verifying installation of most recent Java update (in this case v7 u45) I edited the Forge 1.6.4 Minecraft profile by clicking "edit profile"; checking "Executable:"; and inserting path of Oracle version of Java (not apple) which is "~/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java". Thanks for the update DayZ!

Umm... I tried installing Java 7, and according to the update checker it worked, but Minecraft still crashes with the same error, and when I try to access the file applephx mentioned my computer says that the folder does not exist. Any suggestions?

In the Apple menu goto, "System Preferences". Under the 'Other' category there should be a Java control panel icon. After the Java Control Panel window opens, click the "Java" tab then click the "View..." button. It should give you version information for any versions installed after 7u25 as well as the directory.

Below is a screenshot for clarity. The 'Path' is what should be referenced.

Here is a screenshot of where I put the path:

This is good to know for other mods or future updates. You can't count on Apple to release up to date versions. If your still having trouble try downloading the update HoBaS-TaCo uploaded and you shouldn't have to change anything.