This is what the crash report says:

 

---- Minecraft Crash Report ----

// Oops.

 

Time: 5/22/13 9:04 PM

Description: Failed to start game

 

java.lang.NullPointerException

at net.minecraft.client.gui.FontRenderer.getFontTexturePack(FontRenderer.java:1144)

at net.minecraft.client.gui.FontRenderer.func_98306_d(FontRenderer.java:222)

at net.minecraft.client.gui.FontRenderer.func_98304_a(FontRenderer.java:150)

at net.minecraft.client.gui.FontRenderer.<init>(FontRenderer.java:112)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:407)

at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)

at net.minecraft.client.Minecraft.run(Minecraft.java:732)

at java.lang.Thread.run(Thread.java:680)

 

 

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: 1.6.0_45, Apple Inc.

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Apple Inc.

Memory: 468459312 bytes (446 MB) / 534708224 bytes (509 MB) up to 1069416448 bytes (1019 MB)

JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M

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:

LWJGL: 2.4.2

OpenGL: ATI Radeon HD 2600 PRO OpenGL Engine GL version 2.1 ATI-8.10.44, ATI Technologies Inc.

Is Modded: Definitely; Client brand changed to 'fml,forge'

Type: Client (map_client.txt)

Texture Pack: Minecraft Enhanced v1

Profiler Position: N/A (disabled)

Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

Try without Optifine.