That is what I love about Ps CS6, actually hate: knowing how to do something is one thing but knowing where to do it is something else, and what is often nearly impossible.
Are you using Ps CS6 for Windows or Macintosh? On my Windows CS6 I see no top level "Pull Down" for Open or Raw File. So where are you? Somewhere under File or Edit? Or are you in ACR or Bridge somewhere?
And yes, I've been using Ps long enough to actually have CS6 and not CC.
i am using ps cs6 for windows, guess i should have been more specific...open a raw file, THEN click on file (top left corner, next to PS), scroll down towards the bottom, click on file info, then click on advanced tab (on the top towards the right)
i hope these instructions and photo help you locate the info.
i am surprised you say you find no pull down for file.