I have a simple path in org-mode

/Users/nate/some_pptx.pptx

When I press C-c C-o it opens the file in binary mode in Emacs.

A path to a PDF will actually open the file with the associated program:

/Users/nate/some_png.png -> Opens in Preview when I press C-c C-o

How can I get emacs / org to open pptx files in the same fashion as if I had

double-clicked using Finder on Mac?

Thanks,

--Nate