Minecraft does not work, the Mojang symbol opens and after nothing happens.

Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: @unknown

Time: 04.01.16 18:23
Description: Initializing game

java.lang.OutOfMemoryError: Java heap space
at java.awt.image.DataBufferByte.<init>(DataBufferByte.java:92)
at java.awt.image.ComponentSampleModel.createDataBuffer(ComponentSampleModel.java:445)
at java.awt.image.Raster.createWritableRaster(Raster.java:941)
at javax.imageio.ImageTypeSpecifier.createBufferedImage(ImageTypeSpecifier.java:1074)
at javax.imageio.ImageReader.getDestination(ImageReader.java:2892)
at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1309)
at com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1606)
at javax.imageio.ImageIO.read(ImageIO.java:1448)
at javax.imageio.ImageIO.read(ImageIO.java:1352)
at bml.a(SourceFile:360)
at bmh.b(SourceFile:100)
at bmh.a(SourceFile:77)
at bot.j(SourceFile:553)
at bot.a(SourceFile:139)
at bou.a(SourceFile:23)
at bnn.a(SourceFile:99)
at ave.am(SourceFile:448)
at ave.a(SourceFile:310)
at net.minecraft.client.main.Main.main(SourceFile:124)

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

– Head –
Stacktrace:
at java.awt.image.DataBufferByte.<init>(DataBufferByte.java:92)
at java.awt.image.ComponentSampleModel.createDataBuffer(ComponentSampleModel.java:445)
at java.awt.image.Raster.createWritableRaster(Raster.java:941)
at javax.imageio.ImageTypeSpecifier.createBufferedImage(ImageTypeSpecifier.java:1074)
at javax.imageio.ImageReader.getDestination(ImageReader.java:2892)
at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1309)
at com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1606)
at javax.imageio.ImageIO.read(ImageIO.java:1448)
at javax.imageio.ImageIO.read(ImageIO.java:1352)
at bml.a(SourceFile:360)
at bmh.b(SourceFile:100)
at bmh.a(SourceFile:77)
at bot.j(SourceFile:553)
at bot.a(SourceFile:139)
at bou.a(SourceFile:23)
at bnn.a(SourceFile:99)
at ave.am(SourceFile:448)

– Initialization –
Details:
Stacktrace:
at ave.a(SourceFile:310)
at net.minecraft.client.main.Main.main(SourceFile:124)

– System Details –
Details:
Minecraft Version: 1.8.9
Operating System: Mac OS X (x86_64) version 10.10.5
Java Version: 1.8.0_60, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 2911576 bytes (2 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
Launched Version: 1.8.9
LWJGL: 2.9.2
OpenGL: NVIDIA GeForce GT 650M 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: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: PureBDcraft 512x MC18
Current Language: Deutsch (Deutschland)
Profiler Position: N/A (disabled)
CPU: 8x Intel(R) Core(TM) i7-3615QM CPU @ 2.30GHz