The amazing document converter, Pandoc, is finally available from Homebrew for M1 Macs! So I’ve adjusted my journal workflow to be on my M1 Mac mini. I’ll use 

jhead -autorot *.jpeg
(instead of Graphic Convertor since I only have one license and I want it on my MacBook Pro) for autorotating photos and 
for f in *.md; do pandoc $f -o ./Archive/${f%.md}.pdf -t latex; done
to convert the Markdown files to PDFs.