Greetings, folks, and thank you for the response; it is much appreciated!
> We are not sure why you would be having trouble. If you download,
> unzip, and open this file, go to the Print command, and choose Open
> PDF in Preview (from the PDF menu at the bottom), does that work for
Before I got your response, I did a Safe Boot, as that can often clean up some OS X anomalies. (I really miss the [relative] stability of 10.6.8!) I downloaded your file, and it opens in Preview just fine, which was a relief! I then opened the file I am currently attempting to print to PDF, and it now prints to PDF just fine when in “Wire Frame” mode, but does not work in “Interactive Shaded,” which is what I need--I still get a blank page. (As noted, the “File/Page Preview” menu item produces a great looking image! I just need a higher resolution than a screen shot.) “Surface Render” resolves the model in less than a minute, but then just generates a relentlessly spinning beachball until a force-quit becomes necessary; “Shaded Render” doesn’t give me the edge lines that I need. (The PDFs are for submission to an organization that has strict requirements for submitted images.)
> If that works, but printing another file does not, does choosing the
> File Menu: Plot Print Setup: Scale to Fit option make it work?
The “Plot/Print Setup...” had already been set to “Scale to Fit.”