Installation

Install on macOS

Install

An important dependency before Homebrew can work is the Command Line Tools for Xcode. These include compilers that will allow you to build things from source.

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Setup environment

echo 'export PATH="/usr/local/bin:$PATH"' >> ~/.bash_profile

Check installation

brew doctor

Using Homebrew

To install a package (or Formula in Homebrew vocabulary) simply type:

brew install <formula>

Update

To update Homebrew’s directory of formula, run:

brew update

To see if any of your packages need to be updated:

brew outdated

To update a package:

brew upgrade <formula>

Homebrew keeps older versions of packages installed, in case you want to roll back. That rarely is necessary, so you can do some cleanup to get rid of those old versions:

brew cleanup

To see what you have installed (with their version numbers):

brew list --versions

Homebrew Cask

Let’s see if we can get the elegance, simplicity, and speed of Homebrew for the installation and management of GUI Mac applications such as Google Chrome and Adium.

brew cask install google-chrome

Configure brew on macOS

If you want to use tools such as ruby or gem, you can configure brew to use this tools without the need of superuser permissions: Use environment variable:

export RBENV_ROOT="$(brew --prefix rbenv)"
export GEM_HOME="$(brew --prefix)/opt/gems"
export GEM_PATH="$(brew --prefix)/opt/gems"

Look here

Installation of a Package

Install a specific ruby version

brew update
brew install rbenv
brew install ruby-build

Once you have rbenv and ruby-build installed, you can run the following command to get Ruby 2.3.0 installed.

rbenv install 2.3.0

Now if you’d like to use 2.3.0 by default, you can run the following command:

rbenv global 2.3.0

Finally, add this to your .bashrc

eval "$(rbenv init -)"