How to update Ruby with Homebrew?

I would use ruby-build with rbenv. The following lines install Ruby 3.0.2 and set it as your default Ruby version:

$ brew update$ brew install ruby-build$ brew install rbenv$ rbenv install 3.0.2$ rbenv global 3.0.2

ruby macos homebrew

brew upgrade ruby

Should pull latest version of the package and install it.

brew update updates brew itself, not packages (formulas they call it)

ruby macos homebrew

Adding to the selected answer (as I haven't enough rep to add comment), one way to see the list of available versions (from ref) try:

$ rbenv install -l

CodeHunter