I crash before entering Minecraft on the FTB mod pack. Here's my log:
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: Loading jars...
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: Loading URL: file:/Users/-CENSORED-/Downloads/FTB/FTBBETAA/instMods/MinecraftForge.zip
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: Loading URL: file:/Users/-CENSORED-/Downloads/FTB/FTBBETAA/minecraft/bin/minecraft.jar
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: Loading URL: file:/Users/-CENSORED-/Downloads/FTB/FTBBETAA/minecraft/bin/lwjgl.jar
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: Loading URL: file:/Users/-CENSORED-/Downloads/FTB/FTBBETAA/minecraft/bin/lwjgl_util.jar
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: Loading URL: file:/Users/-CENSORED-/Downloads/FTB/FTBBETAA/minecraft/bin/jinput.jar
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: Loading natives...
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: Fixed Minecraft Path: Field was private static java.io.File net.minecraft.client.Minecraf t.an
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: MCDIR: /Users/-CENSORED-/Downloads/FTB/FTBBETAA/Library/Application Support/minecraft
21:09:49 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:49 [INFO] [ForgeModLoader] Forge Mod Loader version 4.2.18.433 for Minecraft 1.4.2 loading
21:09:50 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:50 [INFO] [STDOUT] Adding Accesstransformer map: codechickencore_at.cfg
21:09:50 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:50 [INFO] [STDOUT] Adding Accesstransformer map: nei_at.cfg
21:09:50 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:50 [INFO] [STDOUT] Inserted super call into auk.c
21:09:50 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:50 [INFO] [STDOUT] atq was overriden from NotEnoughItems 1.4.1.2.jar
21:09:51 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:51 [INFO] [STDOUT] Generated BlockMobSpawner helper method.
21:09:52 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:52 [INFO] [STDOUT] 27 achievements
21:09:52 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:52 [INFO] [STDOUT] 208 recipes
21:09:52 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:52 [INFO] [STDOUT] Setting user: Craftineer, -398201588500545427
21:09:52 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:52 [INFO] [STDERR] Client asked for parameter: server
21:09:52 [INFO] net.ftb.gui.LauncherConsole$OutputOverride.write:65 From Console: 2012-11-12 13:09:52 [INFO] [STDOUT] LWJGL Version: 2.4.2
Also if it's important, I allocated 4096 MB of RAM because my computer has 16GB now.