What I did to get this it to run was go through these steps: http://themacmob.com/forum/steps-downgrade-java-7-java-6-mountain-lion-14477.html
And then I downloaded the .jar version of the technic launcher. I then deleted all of the base files for the technic launcher. And then I ran these individually in terminal:
cd Downloads
export JAVA_HOME=/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
java -jar technic-launcher.jar
The reason that it may have seemed that JaiKai7's commands didn't work is because when he wrote "technic-launcher-latest.jar" he just wanted you to insert the name of the latest technic that you had. Make sure that the launcher is still in the Downloads folder. I am not sure if each of these steps is neccisary, but somehow, mine works with the dev build now. I wish everyone the best of luck.