Mac Please help, Mac problem

[Tomat]

I've been having a problem, whenever I've started feed the beast, or any other mod pack, i put my log in info in, and it downloads all the different modfiles. However, when it s done downloading, the launcher opens, and its a blank white launcher for about 2 seconds, then the whole thing shuts down and closes. I've tried redownloading the modpack numerous times, and deleted all related files, even the minecraft files. Please help me fix this problem, and dont post about how macs are stupid =p i already know...

 

[Nessiroj]

Can you upload the console logs to pastebin atm we are walking in the dark here

 

[Meldiron]

Try the fix described in this thread.
It's old and im not sure if it's been fixed since, but worth a shot anyway.