If memory serves, those export presets were installed separately for Mac users. They didn't come with PP 'out of the box' (so to speak).
Yes, Karl Soule produced a blog telling Mac users how to achieve a Prores workflow end to end, in which he described how to create the export options in Pr CS6.
Didn't I read somewhere, though that Prores would be included in CC? I can't find a link now, though.