This post provides a step-by-step guide with a list of commands on how to install Docker on macOS using Homebrew. Docker is a computer program that performs operating-system-level virtualization, also known as “containerization”.
What is Docker?
“Containers are isolated from each other and bundle their own tools, libraries and configuration files; they can communicate with each other through well-defined channels. All containers are run by a single operating system kernel and are thus more lightweight than virtual machines. Containers are created from “images” that specify their precise contents. Images are often created by combining and modifying standard images downloaded from repositories.” ~ Wikipedia
What is Homebrew?
Homebrew is a free and open-source software package management system that simplifies the installation of software on Apple’s macOS operating system. It is known as the missing package manager for macOS.
The following is the single command required to install Docker on macOS using Homebrew.
$ brew install --cask docker
This section provides a quick set of commands on how to install Docker on macOS using Homebrew. It is assumed that Homebrew is already installed. If not, please follow this link.
$ brew update # Fetch latest version of homebrew and formula. $ brew tap homebrew/cask # Tap the Homebrew/Cask repository from Github using HTTPS. $ brew search docker # Searches all known Casks for a partial or exact match. $ brew info --cask docker # Displays information about the given Cask $ brew install --casl docker # Install the given cask. $ brew cleanup # Remove any older versions from the cellar.
The following command can be used to validate that the installation was successful, and also to ensure the version you installed is up-to-date.
# Show the Docker version information $ docker version # Run the Docker hello-world container $ docker run hello-world
Congratulations! You have successfully installed Docker on macOS making use of Homebrew. Follow me on any of the different social media platforms and feel free to leave comments.