a problem priviosly reported but i can't fix it all

MINECRAFT won't launch

I wanted MINECRAFT to launch

I launched MINECRAFT to find it all load and then the screen turn to the dirt screen and then comes up with a crash report
and i can't fix it
I can't just click run as admin because i can't find where you do that on my MAC

Please help me!!!

1. get any new snapshot past 13wo1a
2. try to open minecraft
3. you see the report