What is “rbenv-default-gems” Package?

Auto-installs gems for Ruby installs
For more details: https://github.com/sstephenson/rbenv-default-gems

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install rbenv-default-gems.

  brew install rbenv-default-gems

Now, use rbenv-default-gems!