I understand that as PDF is sort of built in into MacOS, SketchUp relies on OS functionality to produce PDF on the Mac, but on PC it supplies its own exporters.
As a workaround you could export images and convert them into PDF if needed. I wonder if it is messing around with some kind of print margins settings and if it would work better if you either hadn’t your images going right to the page edge or had margins set to zero in the document setup.