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There are different ruby version managers like rvm, rbenv, and chruby

Change this to rbenv

Chruby is simpler and easier to understand

  1. Install chruby and ruby-install from homebrew
  2. use ruby-install to install a version of ruby ruby-install ruby to install latest version
  3. Enable chruby in your shell and run chruby ruby-2.x.x or chruby system

tags: basics , install source: