I'm running OS X 10.8.2, on a mi-2007 intel mac (2.4 GHz Intel Core 2 Duo, 2 Go RAM, ATI Radeon HD2600 256 Mo).
I downloaded the .dmg, opened it smoothly, copied the application on my external DD. It didn't want to run at first, I opened the package and right-clicked the executable inside, didn't work. I changed my Gatekeeper settings, ran the application. It bounces a few times in the dock, then quits. No message, no window, nothing.