First, let me give a huge thank you to the people who developed reacTIVision. I'm sure you already know this, but you've built an app which lets a lot of people do a lot of really cool things.
I was wondering if anyone has successfully compiled or been able to run the .app for reacTIVision on OSX 10.8. ReacTIVision runs without any problems on my computer with OSX 10.6, but won't launch or run in Xcode in OSX 10.8, due to an error where it said it couldn't find the osx10.4u.sdk. Even after I redirected it to find where Mountain Lion hides the OSX sdk's, it still won't work.
Any advice? I'm using a 2012 MacBook Air, so I can't dual-os 10.6 for compatibility.