I used to deal with this issue of PC PageMaker disks in a Mac & Quark world at a service bureau back in the day. The problem was that PageMaker had unpredictable results when printing to an imagesetter.

I would open the file in Mac PageMaker, delete all the graphics, save the pages as EPS, then rebuild in Quark. Quark had this great Xtension that let you place the output with great precision on the imagesetter film roll.