this script is based on https://robservatory.com/find-and-fix-non-searchable-pdfs/, but includes OCRKit to OCR any pdfs found in the current working directory

ocrpdf.sh

#!/bin/bash

saveIFS=$IFS
IFS=$(echo -en "\n\b")

FilesToCheck=$(find `pwd` -maxdepth 99 -name "*.pdf")

for i in $FilesToCheck
do
    errCheck=$(pdffonts ${i} 2>&1 | tail -1)
    if [[ $errCheck =~ ^- ]]
    then
        printf "running OCR on "$i"\n"
        /Applications/OCRKit\ Pro.app/Contents/MacOS/OCRKit\ Pro --lang de --format pdf $i
    fi
done

IFS=$saveIFS