I’m going to explore this. I get the Output Module Fail error message too. But it seems to be only when I have Audio selected in the output module settings in render queue. If I keep it off, I have no issues with rendering. My project has audio, and requires it turned on. So I’m at an impasse.
MacPro3,1 OSX 10.8.5 10GB ram 4x 2TB HDD 256MB ATI Radeon HD 2600