Mac Error launching ftb

[MattCanMine]

Please give me some help, I really want to play FTB with my friends!!!

Link to the whole report : http://pastebin.com/hV73Njpw

Main Errors are: [ERROR] ImageIO.read:1369->ModpackLoader.run:101: Can't get input stream from URL!: javax.imageio.IIOException: Can't get input stream from URL!

And this error: [ERROR] ClassLoader.defineClass1:-2->MinecraftLauncher.main:217: Unhandled error launching minecraft: java.lang.NoClassDefFoundError: lg

 

[MattCanMine]

FTB Launcher version (if this isn't the newest update update and try again): 1.2.6​

Minecraft Version: 1.6.2 but im launching Ultimate Modpack 1.4.7​

Java version: Not sure how do you find this out?​

Detailed description of the issue / how can the issue be recreated: Its a error in the console when i launch.​

Error logs: [ERROR] ImageIO.read:1369->ModpackLoader.run:101: Can't get input stream from URL!: javax.imageio.IIOException: Can't get input stream from URL!​

Error Logs: [ERROR] ClassLoader.defineClass1:-2->MinecraftLauncher.main:217: Unhandled error launching minecraft: java.lang.NoClassDefFoundError: lg​

 

[Ashzification]

Please read below. Please be sure to read all of the info available in the 2 articles.

Spoiler

Please follow these steps exactly: http://desk.feed-the-beast.com/index.php?/Knowledgebase/Article/View/9/0/basic-troubleshooting
This is to rule out any issues with your setup. Please also read the extra info at the bottom of the guide, and apply all applicable suggestions.

Please post your complete client-side (launcher) console log in debug-mode to pastebin.com and link your paste URL here.
To find your logs and prevent them from expiring: http://desk.feed-the-beast.com/inde...29/1/what-log-do-you-need-where-can-i-find-it

Presently your setup is not correct, do that, then we'll work from there.