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How to install Ruby on a Mac?
  • Mac comes with Ruby
  • Use RVM to get more versions of Ruby and manage versions
How to update Ruby on Mac? (last updated 2020-06)
  • In app, update file .ruby-version to the desired ruby version. (i.e. 2.5.8)
  • cd ..
  • cd app_dir
  • If that version of ruby hasn't been installed yet, rvm will provide directions on how to install it.
    • For example...
      rvm install "ruby-2.5.8"
  • Likely will need to install bundler as well. There is a way to make bundler available to all apps, but rvm did something weird.
    • gem install bundler -v 2.1.4
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