Installing Jekyll on macOS Sonoma

I use a Mac, and whilst macOS ships with a copy of Ruby I immediately ran into issues trying to install Jekyll (mostly around Ruby being out of date). Typically I would just reach for Homebrew and install the latest version of Ruby with something like brew install ruby but in this instance that doesn’t work as well as you might think.

Instead you need to use a Ruby-specific version manager to install a newer version. In this instance we’ll use chruby, but others are available.

Install a newer version of Ruby

Install chruby and ruby-install with Homebrew (if you don’t have Homebrew installed yet, follow the instructions here):

brew install chruby ruby-install xz

Now you can install the latest stable version of Ruby supported by Jekyll (3.1.3 at time of writing):

ruby-install ruby 3.1.3

Finally, configure your shell to automatically use chruby:

echo "source $(brew --prefix)/opt/chruby/share/chruby/" >> ~/.zshrc
echo "source $(brew --prefix)/opt/chruby/share/chruby/" >> ~/.zshrc
echo "chruby ruby-3.1.3" >> ~/.zshrc

I use Zsh for my shell - if you use a different shell you will need to adjust these last few commands. For example if you’re using Bash, replace .zshrc with .bash_profile.

Either relaunch your terminal session or type source ~/.zshrc to reload the configuration.

You can confirm you are now using the version of Ruby installed above by typing the following:

ruby -v

Install Jekyll

Now that you’re on the latest (supported) version of Ruby you can go ahead and install the latest Jekyll gem:

gem install jekyll

From here you can spin up a new site with jekyll new my-awesome-site.

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