install asdf version manager in mac

readme.md

Install asdf using homebrew

$ brew install asdf
$ echo -e '\n. $(brew --prefix asdf)/asdf.sh' >> ~/.zshrc
$ echo -e '\n. $HOME/.asdf/completions/asdf.bash' >> ~/.zshrc
$ asdf

install ruby

$ asdf plugin-add ruby https://github.com/asdf-vm/asdf-ruby.git
$ asdf plugin-list
$ asdf list-all ruby
$ asdf install ruby 2.4.1