:warning: Every time you update Ruby to a version in which the first two digits change, update your path to match.

  1. For Mac - Install commandline tools and set SDKROOT
    xcode-select --install
    export SDKROOT=$(xcrun --show-sdk-path)
  2. Install latest version of ruby with homebrew:
    brew install ruby
  3. Update PATH
    echo 'export PATH="/usr/local/opt/ruby/bin:/usr/local/lib/ruby/gems/3.0.0/bin:$PATH"' >> ~/.zshrc
  4. Check ruby and gem paths
    which ruby
    gem env


List installed gems

gem list

Remove all installed gems

for x in `gem list --no-versions`; do gem uninstall $x -a -x -I; done


  1. For compilers to find ruby you may need to set:
    export LDFLAGS="-L/usr/local/opt/ruby/lib"
    export CPPFLAGS="-I/usr/local/opt/ruby/include"
  2. Install Jekyll for Ruby
    gem install bundler jekyll
  3. Install gems from Gemfile
    bundle install