cannot play the game mine craft

Tried to log into game, log in went ok then when i pressed play i got this message.
---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 7/31/13 12:33 PM
Description: Initializing game

org.lwjgl.LWJGLException: Could not create pixel format
at org.lwjgl.opengl.MacOSXPeerInfo.nChoosePixelFormat(Native Method)
at org.lwjgl.opengl.MacOSXPeerInfo.choosePixelFormat(MacOSXPeerInfo.java:58)
at org.lwjgl.opengl.MacOSXPeerInfo.<init>(MacOSXPeerInfo.java:53)
at org.lwjgl.opengl.MacOSXCanvasPeerInfo.<init>(MacOSXCanvasPeerInfo.java:57)
at org.lwjgl.opengl.MacOSXDisplayPeerInfo.<init>(MacOSXDisplayPeerInfo.java:48)
at org.lwjgl.opengl.MacOSXDisplay.createPeerInfo(MacOSXDisplay.java:304)
at org.lwjgl.opengl.DrawableGL.setPixelFormat(DrawableGL.java:61)
at org.lwjgl.opengl.Display.create(Display.java:846)
at org.lwjgl.opengl.Display.create(Display.java:757)
at org.lwjgl.opengl.Display.create(Display.java:739)
at ats.O(SourceFile:297)
at ats.d(SourceFile:599)
at net.minecraft.client.main.Main.main(SourceFile:101)

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

– Head –
Stacktrace:
at org.lwjgl.opengl.MacOSXPeerInfo.nChoosePixelFormat(Native Method)
at org.lwjgl.opengl.MacOSXPeerInfo.choosePixelFormat(MacOSXPeerInfo.java:58)
at org.lwjgl.opengl.MacOSXPeerInfo.<init>(MacOSXPeerInfo.java:53)
at org.lwjgl.opengl.MacOSXCanvasPeerInfo.<init>(MacOSXCanvasPeerInfo.java:57)
at org.lwjgl.opengl.MacOSXDisplayPeerInfo.<init>(MacOSXDisplayPeerInfo.java:48)
at org.lwjgl.opengl.MacOSXDisplay.createPeerInfo(MacOSXDisplay.java:304)
at org.lwjgl.opengl.DrawableGL.setPixelFormat(DrawableGL.java:61)
at org.lwjgl.opengl.Display.create(Display.java:846)
at org.lwjgl.opengl.Display.create(Display.java:757)
at org.lwjgl.opengl.Display.create(Display.java:739)
at ats.O(SourceFile:297)

– Initialization –
Details:
Stacktrace:
at ats.d(SourceFile:599)
at net.minecraft.client.main.Main.main(SourceFile:101)

– System Details –
Details:
Minecraft Version: 1.6.2
Operating System: Mac OS X (x86_64) version 10.7.4
Java Version: 1.6.0_33, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 53727416 bytes (51 MB) / 85000192 bytes (81 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: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.6.2
LWJGL: 2.9.0
OpenGL: ~_ERROR~ RuntimeException: No OpenGL context found in the current thread.
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Pack: Default
Current Language: ~_ERROR~ NullPointerException: null
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~_ERROR~ NullPointerException: null