SDoF Not Working/Rendering Black Screen

Went to take a screenshot today and couldn’t because super DoF refused to work hence this result:

Anything I’m doing wrong here? Really need to get this working.

[editline]1st September 2014[/editline]

So after some research…all I can find is other mac users (much like myself) completely unable to use SDoF and get the same result. So…what the fuck?