Basically fireworks are bugged with ModLoader. I originally had LWJGL 2.8.5, Sign Tags, and OptiFine, now I have isolated the problem to ModLoader. So you can make fireworks, you can launch them, you can hear the whistle of the firework going up, but you don't see the firework or the explosion, and you don't hear the firework when it's supposed to detonate. The firework I was trying to use was a Normal magenta flight III. I'm using Mac OS X 10.6.8. Graphics card is an ATI Radeon 5670 512 VRAM. 4G of 1333 MHz DDR3 RAM. 3.2 GHz Intel Core i3 processor. Latest Java. I also took the time to launch Minecraft through Terminal, it looks like everything loaded normally, but just in case.
Last login: Sun Dec 23 15:28:46 on ttys001
XXXXXX-2:~ XXXXXXXX$ /Users/XXXXXXXX/Desktop/XXXXX/Gaming/Minecraft/Single\ Player/Start.command ; exit;
27 achievements
210 recipes
Setting user: r10d10, 5c3c7321dbb117f37da8d54c8dbdf9474b135dd9
LWJGL Version: 2.4.2
ModLoader 1.4.6 Initializing...
Done.
Starting up SoundSystem...
Initializing LWJGL OpenAL
(The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
OpenAL initialized.
Dec 23, 2012 3:29:38 PM bdz c
INFO: Starting integrated minecraft server version 1.4.6
Dec 23, 2012 3:29:38 PM bdz c
INFO: Generating keypair
Dec 23, 2012 3:29:38 PM net.minecraft.server.MinecraftServer e
INFO: Preparing start region for level 0
Dec 23, 2012 3:29:39 PM gm a
INFO: r10d10[/127.0.0.1:0] logged in with entity id 49 at (1143.0235610551629, 4.0, 645.248849169688)
Dec 23, 2012 3:29:45 PM bdz q
INFO: Saving and pausing game...
Dec 23, 2012 3:29:45 PM net.minecraft.server.MinecraftServer a
INFO: Saving chunks for level 'Survival'/Overworld
Dec 23, 2012 3:29:45 PM net.minecraft.server.MinecraftServer a
INFO: Saving chunks for level 'Survival'/Nether
Dec 23, 2012 3:29:45 PM net.minecraft.server.MinecraftServer a
INFO: Saving chunks for level 'Survival'/The End
Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer k
INFO: Stopping server
Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer k
INFO: Saving players
Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer k
INFO: Saving worlds
Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer a
INFO: Saving chunks for level 'Survival'/Overworld
Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer a
INFO: Saving chunks for level 'Survival'/Nether
Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer a
INFO: Saving chunks for level 'Survival'/The End
Stopping!
SoundSystem shutting down...
Author: Paul Lamb, www.paulscode.com
logout
[Process completed]
Last login: Sun Dec 23 15:28:46 on ttys001 XXXXXX-2:~ XXXXXXXX$ /Users/XXXXXXXX/Desktop/XXXXX/Gaming/Minecraft/Single\ Player/Start.command ; exit; 27 achievements 210 recipes Setting user: r10d10, 5c3c7321dbb117f37da8d54c8dbdf9474b135dd9 LWJGL Version: 2.4.2 ModLoader 1.4.6 Initializing... Done. Starting up SoundSystem... Initializing LWJGL OpenAL (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org) OpenAL initialized. Dec 23, 2012 3:29:38 PM bdz c INFO: Starting integrated minecraft server version 1.4.6 Dec 23, 2012 3:29:38 PM bdz c INFO: Generating keypair Dec 23, 2012 3:29:38 PM net.minecraft.server.MinecraftServer e INFO: Preparing start region for level 0 Dec 23, 2012 3:29:39 PM gm a INFO: r10d10[/127.0.0.1:0] logged in with entity id 49 at (1143.0235610551629, 4.0, 645.248849169688) Dec 23, 2012 3:29:45 PM bdz q INFO: Saving and pausing game... Dec 23, 2012 3:29:45 PM net.minecraft.server.MinecraftServer a INFO: Saving chunks for level 'Survival'/Overworld Dec 23, 2012 3:29:45 PM net.minecraft.server.MinecraftServer a INFO: Saving chunks for level 'Survival'/Nether Dec 23, 2012 3:29:45 PM net.minecraft.server.MinecraftServer a INFO: Saving chunks for level 'Survival'/The End Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer k INFO: Stopping server Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer k INFO: Saving players Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer k INFO: Saving worlds Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer a INFO: Saving chunks for level 'Survival'/Overworld Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer a INFO: Saving chunks for level 'Survival'/Nether Dec 23, 2012 3:29:50 PM net.minecraft.server.MinecraftServer a INFO: Saving chunks for level 'Survival'/The End Stopping! SoundSystem shutting down... Author: Paul Lamb, www.paulscode.com logout [Process completed]