I need help getting minecraft demo to play on Mountain Lion.

Question

I have tried many many times to get the demo for minecraft to play on my computer and keep getting the same error report. I switched over to windows and it worked just fine there so I'm pretty sure the problem is Mountain Lion and not the whole computer. I've been looking all over the place for a solution and keep seeing that I need to go to system preferences and security and privacy and go tell it to open stuff from anywhere, and I've tried that, three times, and it still won't work. So now I'm going to post the crash report here and see if anyone can give me a different solution because that one, which seems to work for absolutely everyone else, does diddly-squat for me. Thank you in advance if you can help me fix this.
---- Minecraft Crash Report ----
// Ooh. Shiny.
Time: 5/30/13 12:55 AM
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(MacOSXDisplayPeerInf o.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:235)
at avv.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(SourceFile:507)
at java.lang.Thread.run(Thread.java:722)
A detailed walkthrough of the error, its code path and all known details is as follows:
-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Mac OS X (x86_64) version 10.8.3
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 803435408 bytes (766 MB) / 1029046272 bytes (981 MB) up to 1029046272 bytes (981 MB)
JVM Flags: 3 total; -Xbootclasspath/a:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/deploy.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/javaws.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/plugin.jar -Xmx1g -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: ~~ERROR~~ NullPointerException: null
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

Answer 1

I believe you will have to "convert" the movie to H264 or something like that. A free program such as HandBrake will do this job. Or you can let iTunes convert it for you. However, you should be warned that iTunes takes a LONG time to convert a movie. A fast convert will probably take all night and then some. I would go with HandBrake