The Beamer userguide describes how to keep a presentation & an article in the same file using the "beamerarticle" package, with
some article-only stuff
some pres.-only stuff
some common stuff
There's an option [ignorenonframetext] which is meant to make stuff outside a frame appear in the article only. I copied & pasted the examples in the user guide, and they simply do not work. It appears "ignorenonframetext" is inoperative. Text saying "This text is not shown in the presentation, but will be part of the article." appears in both.
This behaviour is almost the opposite of what's reported in query
"\input{…} is ignored with beamer option ignorenonframetext"
I have Mac OS 10.6.8, with TeXShop. I know a lot about LaTeX but very little about the infrastructure. Did Beamer come with TeXShop? I upgraded to the latest TeXShop 2.47 to see if it cures the problem but no. And the beamer userguide that TeXShop's "command-alt-I" feature displays is still version 3.07, though from beamer's website I downloaded a userguide for version 3.26. However the stuff about beamerarticle looks identical in both.