Howtos for writing RFCs and Internet-Drafts in Markdown

Install kramdown-rfc2629 and xml2rfc on Mac

Install Homebrew (see website)
'sudo gem install kramdown-rfc' (see https://www.rubydoc.info/gems/kramdown-rfc2629/)
'pip3 install --upgrade --user xml2rfc' (you might have to do 'brew install python' to obtain pip3)

Literature References in I-D