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So this is my first attempt at installing a mod (besides Optifine), and I am getting a crash. I am on a mac running OSX, and I downloaded Forge and Pixelmon. I put pixelmon in my mods folder, yet when I select the Forge profile and press play, it loads for a minute then crashes. Here is the crash report

---- Minecraft Crash Report ----

WARNING: coremods are present:
Java8CheckerCoremod (Pixelmon-1.8.9-4.2.1-universal.jar)
Contact their authors BEFORE contacting forge

// Don't be sad. I'll do better next time, I promise!

Time: 2/22/16 7:36 PM
Description: Initializing game

java.lang.OutOfMemoryError: Java heap space
at net.minecraftforge.client.model.pipeline.UnpackedBakedQuad$Builder.<init>(UnpackedBakedQuad.java:93)
at net.minecraftforge.client.model.ItemLayerModel.buildQuad(ItemLayerModel.java:359)
at net.minecraftforge.client.model.ItemLayerModel.buildSideQuad(ItemLayerModel.java:343)
at net.minecraftforge.client.model.ItemLayerModel.addSideQuad(ItemLayerModel.java:268)
at net.minecraftforge.client.model.ItemLayerModel.getQuadsForSprite(ItemLayerModel.java:219)
at net.minecraftforge.client.model.ItemLayerModel.bake(ItemLayerModel.java:95)
at net.minecraftforge.client.model.ModelLoader$VanillaModelWrapper.bake(ModelLoader.java:531)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:148)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110544_b(SimpleReloadableResourceManager.java:130)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110541_a(SimpleReloadableResourceManager.java:111)
at net.minecraft.client.Minecraft.func_110436_a(Minecraft.java:732)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:326)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:495)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Stacktrace:
at net.minecraftforge.client.model.pipeline.UnpackedBakedQuad$Builder.<init>(UnpackedBakedQuad.java:93)
at net.minecraftforge.client.model.ItemLayerModel.buildQuad(ItemLayerModel.java:359)
at net.minecraftforge.client.model.ItemLayerModel.buildSideQuad(ItemLayerModel.java:343)
at net.minecraftforge.client.model.ItemLayerModel.addSideQuad(ItemLayerModel.java:268)
at net.minecraftforge.client.model.ItemLayerModel.getQuadsForSprite(ItemLayerModel.java:219)
at net.minecraftforge.client.model.ItemLayerModel.bake(ItemLayerModel.java:95)
at net.minecraftforge.client.model.ModelLoader$VanillaModelWrapper.bake(ModelLoader.java:531)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:148)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110544_b(SimpleReloadableResourceManager.java:130)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110541_a(SimpleReloadableResourceManager.java:111)
at net.minecraft.client.Minecraft.func_110436_a(Minecraft.java:732)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:326)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:495)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.8.9
Operating System: Mac OS X (x86_64) version 10.10.4
Java Version: 1.8.0_60, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 152160 bytes (0 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.19 Powered by Forge 11.15.1.1722 4 mods loaded, 4 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJA mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCHIJA FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.1722.jar)
UCHIJA Forge{11.15.1.1722} [Minecraft Forge] (forge-1.8.9-11.15.1.1722.jar)
UCHIJA pixelmon{4.2.1} [Pixelmon] (Pixelmon-1.8.9-4.2.1-universal.jar)
Loaded coremods (and transformers):
Java8CheckerCoremod (Pixelmon-1.8.9-4.2.1-universal.jar)

Launched Version: 1.8.9-forge1.8.9-11.15.1.1722
LWJGL: 2.9.2
OpenGL: NVIDIA GeForce GT 750M OpenGL Engine GL version 2.1 NVIDIA-10.4.2 310.41.35f01, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: Defscape 64x 2.5.zip
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-4570S CPU @ 2.90GHz

THANKS SO MUCH <3