Launcher opens, but doesn't launch game

[Diabolus Lucis]

Launcher Version: 1.0.3.4

Operating System: Mac OSX 10.8.2

Java Version: Java 7

Antivirus Program: N/A

Description of Problem:

So I'm able to open the launcher and sign in, but then when it starts to start up the game "Mojang" never appears and it closes after about 2-4 seconds.

Error Messages:

N/A

Error Log:

[00:13:21] [sEVERE] ------------------------------------------

[00:13:21] [sEVERE] Launcher is starting....

[00:13:21] [sEVERE] Launcher Build: '1.0.3.4'

[00:13:21] [sEVERE] Allocated 1820.5 Mb of RAM

[00:13:21] [sEVERE] Java VM: '1.7.0_07-b10'

[00:13:21] [sEVERE] OS Version: '10.8.2'

[00:13:21] [sEVERE] Is 64-bit: 'true'

[00:13:23] [sEVERE] [info] Downloading 'mirrors.yml' from 'http://mirror.technicpack.net/Technic/mirrors.yml'.

[00:13:23] [sEVERE] Starting download of 'http://mirror.technicpack.net/Technic/CHECKSUM.md5', with 3 trie(s) remaining

[00:13:24] [sEVERE] Copying: /temp/file5486354706976090365.tmp to: /launcher/CHECKSUM.md5

[00:13:24] [sEVERE] File Downloaded: /launcher/CHECKSUM.md5

[00:13:24] [sEVERE] [MD5 Mismatch] File '/launcher/tekkit/modpack.yml' has md5 of 'c1ca8bff16bc6a95b6bd7a25f6b443d1' instead of 'a153f7d39fc0fb39a6808a6bc40c1909'

[00:13:24] [sEVERE] [info] Downloading 'modpack.yml' from 'http://mirror.technicpack.net/Technic/tekkit/modpack.yml'.

[00:13:25] [sEVERE] [info] Downloading 'minecraft.yml' from 'http://mirror.technicpack.net/Technic/minecraft.yml'.

[00:13:51] [sEVERE] Loading Launcher from 'techniclauncher/tekkit'

[Jorcer]

Downgrade Java to version 6