My Minecraft isn't letting me download anything?

So here's the issue, my Minecraft will not let me install anything. No texture packs, no worlds, no mods. I used to have a mine craft and everything worked fine but one day i deleted it it and now i redownloaded it and when I follow the regular mine craft steps to install texture packs or worlds, it doesn't work! The launcher works perfectly fine tho so I don't know what to do!
P.S: I have a mac, and my minecraft version is 1.7.4

Good minecraft radar mod?

So I'm looking for a radar mod like RADARBRO but that works with 1.6.4 and works on servers without it having to be installed on the server I play on a pixelmon server and I'm trying to farm items but the Pokémon end up walking away from the battle area and I lose the items I'm looking for something that can help me locate them after I lose them

My Minecraft and Technic does not work

With vanilla it just opens then gives an error code, and with technic it just loads the game and doesn't even get to the mojang screen, it just closes and goes back to the different mod packs screen. Here is the error log ---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 2/8/14 2:13 PM
Description: Initializing game

org.lwjgl.LWJGLException: Pixel format not accelerated
at org.lwjgl.opengl.WindowsPeerInfo.nChoose… Method)
at org.lwjgl.opengl.WindowsPeerInfo.chooseP…
at org.lwjgl.opengl.WindowsDisplay.createWi…
at org.lwjgl.opengl.Display.createWindow(Di…
at org.lwjgl.opengl.Display.create(Display…
at org.lwjgl.opengl.Display.create(Display…
at org.lwjgl.opengl.Display.create(Display…
at azi.ad(SourceFile:325)
at azi.f(SourceFile:696)
at net.minecraft.client.main.Main.main(Sour…

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

-- Head --
Stacktrace:
at org.lwjgl.opengl.WindowsPeerInfo.nChoose… Method)
at org.lwjgl.opengl.WindowsPeerInfo.chooseP…
at org.lwjgl.opengl.WindowsDisplay.createWi…
at org.lwjgl.opengl.Display.createWindow(Di…
at org.lwjgl.opengl.Display.create(Display…
at org.lwjgl.opengl.Display.create(Display…
at org.lwjgl.opengl.Display.create(Display…
at azi.ad(SourceFile:325)

-- Initialization --
Details:
Stacktrace:
at azi.f(SourceFile:696)
at net.minecraft.client.main.Main.main(Sour…

-- System Details --
Details:
Minecraft Version: 1.7.4
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 41294536 bytes (39 MB) / 81788928 bytes (78 MB) up to 954728448 bytes (910 MB)
JVM Flags: 2 total; -XX: HeapDumpPath=MojangTricksIntelDriver… -Xmx1G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.7.4
LWJGL: 2.9.1
OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
GL Caps:
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
Anisotropic Filtering: Off (1)

Added (1). Also I have already updated my video card driver twice and it has not fixed the problem.

How to change minecraft health bar?

Ok so i have my world and i want to change the heath bar to the hardcore health bar dose anyone know how i can do that
and please do not say get a mod or make a new hardcore world thanks

Why can't I play Minecraft (PC) with Magic Launcher?

*** MagicMinecraftLauncher 1.2.5 ***
LCP: F:\Minecraft\MODS\LittleBlocks-Universal…
MainClass: net.minecraft.client.Minecraft
java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException
at java.lang.Class.getDeclaredMethods0(Nati… Method)
at java.lang.Class.privateGetDeclaredMethod… Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at magic.launcher.Launcher.main(SourceFile:…
Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivile… Method)
at java.net.URLClassLoader.findClass(Unknow… Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
… 5 more

Um when I press Login with my Minecraft user name and password it just shows that? Do I just get new Java? I'm just trying to install mods.

Minecraft freezes on Loading World Building Terrain?

I recently bought and installed Minecraft, and am not running any mods. For the past few days its been working fine, but last night I tried to load it and the screen wouldn't change beyond the "Loading World, Building Terrain" screen. If I wait a very long time, sometimes it jumps back to the world selection screen, but clicking my world again just takes it to the same place. I've heard that Minecraft uses a lot of RAM and I tried pasting "-Xmx2048M -Xms2048M" into the profile editor to allot more space, but that seems to not have changed anything.

I can't figure out what's wrong, because to my knowledge nothing differed between playing it yesterday afternoon and playing it yesterday evening, but it just won't work now.

Minecraft Item Exchange mod?

I'm playing 1.6.4 and i have Way to much cobblestone and cocoa beans, I was wondering if there was a mod to exchange items for another, like a stack of cobblestone would give you 1 iron or something. I have the Condensing mod but you can't condense cocoa beans and i don't just want to throw them away, and i do have TMI but i'm not using it because i don't wanna cheat in this world i have. (and yes i can just delete the items and give myself items but thats not what i want. ) The Equal Exchange 2 mod isn't updated for 1.6.4 so it won't work, Thanks.

Minecraft shaders mod not working?

Okay maybe i just can't run shaders, but this is unbelievable. I can put the mod in it, but as soon as i select the specific pack and exit out of the menu, minecraft crashes. No matter what pack i use, it crashes.