ClothSword

Solution here: http://forums.technicpack.net/threads/apple-removed-java-support-now-tekkit-doesnt-work-vanilla-minecraft-does.28676/ SO follow the terminal instructions. You need to go to the tekkit website and download the technic launcher for linux (the jar one) and run that from the terminal. I STRONGLY recommend you backup all your saves on a regular basis, I'm glad i did! You might need to delete the techniclauncher folder from application support and have it all isntalled again, due to only 3 mods loading. WHen you do this, you will of course need to copy the correct minecraft_1.2.5.jar file to the cache folder. (See sticky which talks about "update failed") If you use zsh rather than bash, the export java home line needs to go in your .zshrc file.

Tested in a windows 8 virtual machine, asserted the following: 1. Works in windows 8 on this hardware, using Java 1.6, and copying the minecraft_1.2.5.jar downloaded from the sticky thread into the cache folder 2. Sphax purebdcraft texture pack copied over causes it to crash as it does on the mac, perhaps a newer download won't cause that problem? There are no texture packs on the mac tekkit, so that isn't the mac tekkit's problem 3. Windows 8 is the new Vista. The shift key doesn't work properly... I'd stick to windows 7 for now

Java working: > java -version java version "1.7.0_10-ea" Java SE Runtime Environment (build 1.7.0_10-ea-b09) Java HotSpot 64-Bit Server VM (build 23.6-b03, mixed mode) Also ran a java program, it splurted out the output its supposed to.

Launcher Version: 1.0.2.0 Operating System: Mac OSX 10.8.2 Java Version: 1.7.0_10-ea-b09 Antivirus Program: None Description of Problem: [MD5 Mismatch] File '/launcher/tekkit/modpack.yml' has md5 of '0617096edb6df25e4377a265c12483ba' instead of '032eedc7183acde5b75cd13f9ff2e324' Have already deleted modpack.yml and let the technic launcher recreate it. This is NOT "update failed" problem: when clicking login, it works, the new window is opened, however it then closes before getting to display the mojang logo. Mac with 8GB Ram and discrete graphics, Recently the Java was updated, could be the issue. Error Messages: None Error Log: [12:04:27] [sEVERE] Launcher is starting.... [12:04:27] [sEVERE] Launcher Build: '1.0.2.0' [12:04:27] [sEVERE] Allocated 2730.6875 Mb of RAM [12:04:27] [sEVERE] Java VM: '1.7.0_10-ea-b09' [12:04:27] [sEVERE] OS Version: '10.8.2' [12:04:27] [sEVERE] Is 64-bit: 'true' [12:04:28] [sEVERE] [info] Downloading 'mirrors.yml' from 'http://mirror.technicpack.net/Technic/mirrors.yml'. [12:04:29] [sEVERE] Starting download of 'http://206.217.207.1/Technic/CHECKSUM.md5', with 3 trie(s) remaining [12:04:29] [sEVERE] Copying: /temp/file8081316325167248990.tmp to: /launcher/CHECKSUM.md5 [12:04:29] [sEVERE] File Downloaded: /launcher/CHECKSUM.md5 [12:04:29] [sEVERE] [MD5 Mismatch] File '/launcher/tekkit/modpack.yml' has md5 of '0617096edb6df25e4377a265c12483ba' instead of '032eedc7183acde5b75cd13f9ff2e324' [12:04:30] [sEVERE] [info] Downloading 'modpack.yml' from 'http://mirror.technicpack.net/Technic/tekkit/modpack.yml'. [12:04:30] [sEVERE] [info] Downloading 'minecraft.yml' from 'http://mirror.technicpack.net/Technic/minecraft.yml'. [12:04:35] [sEVERE] Loading Launcher from 'techniclauncher/tekkit'

I have same problem in Vanilla. Suspect Minecraft servers are down, as the 503 is from accessing session.minecraft.net