>>>>I have installed a PDF printer on my Mac.
What AutoCAD version are you using?
Since 2018 version there is no need to install PDF printers, AutoCAD has its own build-in PDF printing devices, which you can select in Page setup:

use them and everything should be right with paper sizes and fonts.

In 2017 version you can use build-in AutoCAD PDF "printers" only with Batch publish.

I don't believe you have 2016 version or earlier...