Hey guys! This is my first post on Technic Forums so please give me some slack.
As you can tell by the title, with some simple terminal commands, you can get the technic launcher running on OS X java 7.
First, you'll want to download the Technic Launcher .jar and put it on your desktop.
Second, you'll want to open up terminal. If you don't know where Terminal is, click on Spotlight and search "Terminal" (no quotes). It should be the first to come up.
Third, you want to navigate to your desktop with the 'cd' command. Note that for any commands I tell you to type in, there are no quotes or parenthesis.
You navigate to your desktop by typing in this command:
In which case (username) would be your user. Ex. mine would be MceraWV.
Fourth, you'll want to type in this command:
'java - jar TechnicLauncher.jar'
Again, no quotes and make sure that you haven't renamed the launcher.
Fifth, allow the launcher to start up and select your modpack; let it install.
After step five, you can quit terminal. The reason this works is because OS X uses java 6 for Terminal, but double-clicking .jar file uses java 7. You're probably wondering 'Do I have to do this every time?' The funny thing is, you don't! After completing these 5 steps, you can launch the technic launcher by double-clicking the .jar file.
NOTE: If you want to install more modpacks, then you must repeat these steps for each individual modpack you wish to install.