On a PC(Windows) the Ctrl key has the same function as the Command key on the Mac, so of course in that case Ctrl-Q would indeed quit an app.
True, and that made me think possibly this was the reason Cmd-Q was not implemented in the Mac build. At least we have the red dot to the rescue.
Thanks also works on 10.8.3, but as Gary said red dot almost always closes application window not the app.
The newer version of RawTherapee 4.0.11 is released, including Mac OS X 10.6