How to convert PDF to JPG/PNG (images) via command line prompts on MacOS zsh terminal.
STEP 1 : Install poppler via brew install poppler
STEP 2a : If you only wanna convert one file, run,
pdftoppm -jpeg -r 300 path-to-input-folder/**/*.pdf path-to-output-folder/*
STEP 2b : If you wanna loop through all the files in then execute,
for file in path-to-input-folder/**/*; do pdftoppm -jpeg -r 300 $file path-to-output-folder/*; done;