Pagemaker 6.5 and 7.0, at least on my Mac, came with a "lite" version of Adobe Acrobat Distiller. I make pdfs out of PageMaker all the time - on a Mac. I still have to use an older Mac because PageMaker was never upgraded to Mac OSX, neither was the version of Acrobat Distiller on my computer.

The process: Print the PageMaker doc. In print options, check the "Write Postscript to file" option. I then drag and drop the .ps file onto the Distiller icon, but you can also open it from from the application menu. Either way you wind up with a pdf.

Does PageMaker PC come with Acrobat Distiller?