Open Source OCR on MacOS

MacOS Catalina (10.15) broke many things on my computer, but the one that has wasted the most of my time so far while I try to make old PDFs available to vision-impaired students is the fact that Apple broke Adobe Acrobat Pro and the nasty Creative Cloud license manager that goes with it. I lost most of a day trying to get all that closed source nastiness working again before deciding to solve the problem the way I always should have, with open source software. This little script uses ghostscript and tesseract to turn an image pdf into an OCRd version of that pdf.