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Install Ruby on macOS with Version Manager ​

Outline ​

brew install rbenv ​

shell
brew install rbenv ruby-build

Setup Paths ​

bash ​

shell
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile

zsh ​

shell
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.zprofile
echo 'eval "$(rbenv init -)"' >> ~/.zprofile

Commands ​

list all available versions ​

shell
rbenv install -l

install a Ruby version ​

shell
rbenv install 3.1.2
rbenv install 2.1.4

set ruby version for a specific dir ​

shell
rbenv local 2.1.4

set ruby version globally ​

shell
rbenv global 3.1.2

rbenv rehash
gem update --system

Debugging ​

rbenv install 3.1.2

Bug 1 ​

Problem: Could not install a ruby version

shell
brew install openssl libffi zlib readline

Bug 2 ​

Error: You don't have write permissions for the /Library/Ruby/Gems/2.6.0 directory.

Solution:

  1. Deleted the Gemfile.lock
  2. Run bundle

Credit ​