See: https://jekyllrb.com/docs/quickstart/
brew install chruby ruby-install
ruby-install ruby
echo "source $(brew --prefix)/opt/chruby/share/chruby/chruby.sh" >> ~/.bash_profile
# restart terminal
chruby
# copy actual version number bellow
echo "chruby ruby-3.1.2" >> ~/.bash_profile
ruby-install ruby
# restart terminal
ruby -v
gem install jekyll
bundle install
make server