chami

I'm thinking you're running into the LWJGL bug, and there are solutions here.

Put it in Fullscreen (Function+F11) and that should fix it. Alternatively, restore your version of LWJGL and do solution 1 instead - your mac probably has a video card that is affected by the LWJGL bug.

Minecraft crashing while launching from the Technic Launcher on OSX? Read here.

That I can't help you with, it's probably best for you to check out the Bug Report forums and FAQs first.

I've been seeing a lot of these requests lately, and after running into the problem myself I figured I would list down solutions that are known to work. The crash has something to do with Java 1.7 requiring LWJGL 2.9, and that's the extent of what I know about it. Keep in mind that the Minecraft 1.6 update will update everyone to LWJGL 2.9 regardless, so these fixes are only applicable while we're waiting on mods and modpacks to update to 1.6. Solution 1: Make the Technic Launcher run in Java 1.6 This solution involves creating a .command script in TextEdit that tells OS X to run the Technic Launcher and Minecraft in Java 1.6 instead of 1.7. This is only useful if you already have 1.6 installed on your system. Directions thanks to Diah: If you want to just flat-out uninstall Java 7 or need to download Java 6, links can be found here at the Spout Wiki. Solution 2: Update LWJGL in your technic install (do not do this if you have an intel graphics card and are unwilling to download LWJGL nightly builds) This is a significantly less involved, but riskier fix. The reason this is risky is because the current version of LWJGL (2.9) has a bug that causes Minecraft to render upside-down on Intel video cards. You need to update LWJGL for every pack you play. 1. Download the latest version of LWJGL here. If you have an Intel card, you may want to try downloading a version from their Jenkins, but it might be better to wait for a release version. Use Solution 1 for a more stable solution. 2. Open the Technic Launcher and navigate to the pack you want to update by clicking on the cogwheel underneath the pack's icon on the list and clicking "Open Folder". 3. Follow the directions for updating LWJGL on the Minecraft Wiki. It goes without saying that you install it in the modpack's folder that you opened in step 2. Hope it helps!

What I really wish existed was a guide to Harken Scythe crafting - all the images on his Minecraft forums page are down due to bandwidth, and they don't really explain much about how to collect souls/blood/whatever.

Update your LWJGL version with at least version 2.9.0 from lwjgl.org. Directions on what files to copy are here.

The link gives you information you need to find the logs that you need to post so people can diagnose the problem. Since you're crashing while Voltz is loading, you might want to look into your application support/technic/voltz/crash-reports folder and paste the contents of the crash log from the relevant date into a new thread with pertinent information like your OS and java version in the bug reports forum for Voltz. Only then can people help you. A crash like what you show in your video can be any number of things. More knowledgeable people will need to see the logs before they can diagnose the problem. Hope this helps!

I'm guessing it's "when Minecraft becomes compatible with Java 7."

Have you tried the fixes in the thread? What error messages pop up?

It's a Mac issue - neither Spoutcraft nor Minecraft itself is compatible with Java 7 on OS X. Directions to making it work are here: MAC USERS! IMPORTANT FIX! HELLO CRASH PROBLEM.

Minecraft doesn't work with Java 7 on macs, period. What you CAN do, however, is make it run in Java 6 JRE (which should still be on the Mac). Make a text file with the following in it: #!/bin/bash cd <wherever you have your technic launcher installed> export JAVA_HOME=/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home java -jar technic-launcher.jar save that as whateveryouwant.command, and then open up Terminal and type in chmod +x <path to your whateveryouwant.command>. That should make it a program you can just open to run the Technic Launcher and thus Minecraft. more info is here, Diah's command might work better for you. If you use other modpack launchers, this fix should work for them as well.