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so i have a macbook air, and i wanna play ftb yogcraft on it
every time i launch the modpack minecraft crashes

here is the crash repport :

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 1/24/14 6:20 PM
Description: Failed to start game

org.lwjgl.LWJGLException: Could not get the JAWT interface
at org.lwjgl.opengl.AWTSurfaceLock.lockAndInitHandle(Native Method)
at org.lwjgl.opengl.AWTSurfaceLock.access$100(AWTSurfaceLock.java:49)
at org.lwjgl.opengl.AWTSurfaceLock$1.run(AWTSurfaceLock.java:89)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.opengl.AWTSurfaceLock.privilegedLockAndInitHandle(AWTSurfaceLock.java:86)
at org.lwjgl.opengl.AWTSurfaceLock.lockAndGetHandle(AWTSurfaceLock.java:64)
at org.lwjgl.opengl.MacOSXCanvasPeerInfo.initHandle(MacOSXCanvasPeerInfo.java:53)
at org.lwjgl.opengl.MacOSXDisplayPeerInfo.doLockAndInitHandle(MacOSXDisplayPeerInfo.java:56)
at org.lwjgl.opengl.PeerInfo.lockAndGetHandle(PeerInfo.java:85)
at org.lwjgl.opengl.MacOSXContextImplementation.create(MacOSXContextImplementation.java:47)
at org.lwjgl.opengl.Context.<init>(Context.java:120)
at org.lwjgl.opengl.Display.create(Display.java:858)
at org.lwjgl.opengl.Display.create(Display.java:784)
at org.lwjgl.opengl.Display.create(Display.java:765)
at net.minecraft.client.Minecraft.a(SourceFile:232)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(SourceFile:515)
at java.lang.Thread.run(Thread.java:744)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Mac OS X (x86_64) version 10.9.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 200203440 bytes (190 MB) / 259522560 bytes (247 MB) up to 4260102144 bytes (4062 MB)
JVM Flags: 8 total; -Xms256M -Xmx4096M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+AggressiveOpts -XX:+CMSClassUnloadingEnabled -XX:PermSize=128m -XX:MaxPermSize=128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: [net.ftb.data.Settings, LauncherStyle], [net.ftb.mclauncher.MinecraftLauncher, MinecraftFrame], [net.ftb.util.OSUtils, OS, StyleUtil], [net.minecraft.Launcher]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: ~~ERROR~~ NullPointerException: null
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null







thanks, hope you could help

I found your problem...


You're using a mac.

Quote from Rhys223

I found your problem...


You're using a mac.

No, the problem is that you're using java 1.7. You need to downgrade to java 1.6. This process is much more in-depth than most minecraft related things, and can get very technical. First of all, did you recently update java, or is this the first time you've downloaded it?

If you recently upgraded, chances are that the old installation is still there, and you will need to change your installation so that it uses the old files, instead of the new ones.

If this is your first time getting java, then you will need to download an old version, and then make sure it recognizes the old installation, instead of the new one.

I have recently updated java, and i dont think i still have the old versions

And i can made it work on a macbook pro, very well too

Any ideas

Like I said, you need to be using java 1.6, instead of 1.7. Unless you specifically removed 1.6 before installing 1.7, then you do still have the old version. Google "how to downgrade java 1.7 to 1.6 on mac". If you can't figure it out, your best bet is to ask someone who knows a lot about computers to help. Like the geek squad, for instance. They can give you more support in person than I can over the internet. Good luck!

thank you, ill try it

so im having a hard time downloading java 6, but on an other mac i have access to there is java 6.
on that mac it works just fine

so is there a way to transfer java from one computer and download it on the one that doesn't work ?

I managed to find a set of exact instructions for you.

Note: You must be logged in as an administrator. If prompted for your administrator password after a command, enter it and then press the Return or Enter key.

Open Terminal, located in the Utilities folder.
Enter this command, then press the Return or Enter key:

sudo mkdir -p /Library/Internet\ Plug-Ins/disabled

Enter this command, then press the Return or Enter key:

sudo mv /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin /Library/Internet\ Plug-Ins/disabled

Enter this command, then press the Return or Enter key:

sudo ln -sf /System/Library/Java/Support/Deploy.bundle/Contents/Resources/JavaPlugin2_NPAPI.plugin /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin

To re-enable Java SE 6 Web Start, enter this command, then press the Return or Enter key:

sudo ln -sf /System/Library/Frameworks/JavaVM.framework/Commands/javaws /usr/bin/javaws