Actonawhim

UPDATE TO THE UPDATE: The modpacks seem to be working fine, though it does take a minute for the Mojang screen to transition.

UPDATE: I think I found a solution (though it may only be for macs, I'm not sure). So I checked my java version, and it was Java 7. Using these instructions I reverted back to Java 6. Upon reopening Technic Launcher I was able to open the vanilla version successfully. The other modpacks have yet to be attempted. For Windows, instructions on reverting back to Java 6 can be found here. Hope this helps!

I'm having the same problem. The first time I tried to open a modpack, it got to the Mojang screen but then quit after a few seconds. After that, it never got to that point at all, it would show FML loading and then everything would quit. I tried deleting and re-downloading, but nothing has changed. I have a MacBook Pro with version 10.8.3 installed. Not sure what the java version is, but any help would be greatly appreciated.