@alfrix I theorized there was a fundamental difference in DPI functionality, where Illustrator (or the macOS) treats screen DPI as 72 while Inkscape in X11/XQuartz uses 96. As part of Inkscape’s conversion of any Illustrator PDF, it proportionally upscales the canvas and the artwork for some reason.
Incidentally, when you open an Inkscape SVG in Illustrator, similar weirdness seems to occur, but it’s been so long since I tried to do that, I can’t remember exactly what that weirdness is. Perhaps it’s time to experiment again, just for enlightenment on the issue.
The Mac has a command line that is very similar that of Linux, because they both have roots in Unix. Thanks so much for all your work on the script thus far!