help with installing optifine

[marathonishalo6]

i tried to install optifine as the game lags too much to play, and i get this error message:

--- BEGIN ERROR REPORT 4e33f22 --------

Full report at:

/Users/Brendan/Library/Application Support/technic/modpacks/bigdig/crash-reports/crash-2013-11-10_11.51.51-client.txt

Please show that file to Mojang, NOT just this screen!

 

Generated 11/10/13 11:51 AM

 

-- System Details --

Details:

    Minecraft Version: 1.5.2

    Operating System: Mac OS X (x86_64) version 10.8.5

    Java Version: 1.6.0_65, Apple Inc.

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

    Memory: 26209320 bytes (24 MB) / 85729280 bytes (81 MB) up to 4290641920 bytes (4091 MB)

    JVM Flags: 2 total; -Xmx4096m -XX:MaxPermSize=256m

    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: 2.9.0

    OpenGL: ATI Radeon HD 4670 OpenGL Engine GL version 2.1 ATI-8.16.74, ATI Technologies Inc.

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

    Type: Client (map_client.txt)

    Texture Pack: Default

    Profiler Position: N/A (disabled)

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

 

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:408)

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

    at net.minecraft.client.Minecraft.run(Minecraft.java:733)

    at java.lang.Thread.run(Thread.java:695)

--- END ERROR REPORT 86769a09 ----------

 

 

i was trying to install Optifine V1.5.2 HD Ultra D5. i installed it by taking the files and inserting them into the modpack.jar. can someone plese help me?