step 1) download linux/jar version
step 2) make a folder and put the jar in there
step 3) open terminal through spotlight
step 4) type or copy and paste this code in terminal
cd ~/Desktop/technic/
export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home
java -jar technic-launcher.jar
step 5) profit
this is the only way i know its easy to do if you put the code on notepad and save it somewhere. the only problem with this is you have to open terminal up every time you want to play.