i downgraded to java 6 using this article:http://service.parachat.com/knowledgebase/226/How-can-I-uninstall-Oracle-Java-7-and-reinstall-Apples-Java-6-on-my-Mac.html
This article too: http://support.apple.com/kb/HT5559
there is still a problem in loading it. The screen turn black momentarily then crashes again.
here's the log
Marker - Nov 5, 2012 4:23:36 PM
[16:23:50] [sEVERE]------------------------------------------
[16:23:50] [sEVERE]Launcher is starting....
[16:23:50] [sEVERE]Launcher Build: '1.0.2.0'
[16:23:50] [sEVERE]Allocated 910.25 Mb of RAM
[16:23:50] [sEVERE]Java VM: '1.7.0_09-b05'
[16:23:50] [sEVERE]OS Version: '10.8.2'
[16:23:50] [sEVERE]Is 64-bit: 'true'
[16:23:51] [sEVERE][info] Downloading 'mirrors.yml' from 'http://mirror.technicpack.net/Technic/mirrors.yml'.
[16:23:51] [sEVERE]Starting download of 'http://206.217.207.1/Technic/CHECKSUM.md5', with 3 trie(s) remaining
[16:23:53] [sEVERE]Copying: /temp/file1103680382253302179.tmp to: /launcher/CHECKSUM.md5
[16:23:53] [sEVERE]File Downloaded: /launcher/CHECKSUM.md5
[16:23:53] [sEVERE][MD5 Mismatch] File '/launcher/technicssp/modpack.yml' has md5 of 'e52ba8c1194de5b2fb2b37e66c7b8d7b' instead of '9d522b4238519f293d896b1890e4fe86'
[16:23:53] [sEVERE][info] Downloading 'modpack.yml' from 'http://mirror.technicpack.net/Technic/technicssp/modpack.yml'.
[16:23:56] [sEVERE][info] Downloading 'minecraft.yml' from 'http://206.217.207.1/Technic/minecraft.yml'.
[16:24:03] [sEVERE]Loading Launcher from 'techniclauncher/technicssp'
[16:24:04] [sEVERE]IDResolver - Loaded 785 IDs sucessfully.
[16:24:04] [sEVERE]IDResolver - Loaded 39 Mod Priorities sucessfully.
[16:24:04] [sEVERE]IDResolver - 'UpdateTickSettings' called.