I want to know how to update to the latest stable version of Ruby with Homebrew. I am not interested in using RVM. Thanks.
I would use ruby-build with rbenv. The following lines install Ruby 2.7.2 and set it as your default Ruby version:
rbenv
$ brew update $ brew install ruby-build $ brew install rbenv $ rbenv install 2.7.2 $ rbenv global 2.7.2