Not sure if this is relevant any longer, but you can go into terminal and type:
cd desktop (enter)
export JAVA_HOME=/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
java -jar technic-launcher-latest.jar (enter)
make sure techninc launcher is named and technic-launcher-latest.jar from the terminal entrance are the same. and make sure you're techinc launcher is on your desktop.