Docker has transformed how developers work. It enables the secure transfer of code from one machine to another without regard for dependencies or server versions. This guide will show you how to install Docker on Mac OS using Homebrew.

What Is the Difference Between Homebrew and Homebrew Cask?

Don’t know what Homebrew is? It’s a macOS package manager. It is a command-line utility that allows you to install software on your Mac. It’s convenient and simple to use, which is why it’s so popular.

You may simply type to install almost anything.

Wait a few seconds after running brew install Docker. However, Homebrew Cask is required for Docker installation.

If you’ve ever installed any GUI software on a Mac the “traditional way,” you’ll know that it usually involves downloading the package, opening it, and installing it through drag-and-drop to the Application folder. Homebrew can only install command-line utilities by default.

Homebrew Cask is a Homebrew plugin for installing graphical user interface apps on the Mac. This means that you can utilize this instead of the traditional download and

Drag-and-drop approach.

Install a brew cask

Docker for Mac is a graphical user interface (GUI), hence you must use Homebrew Cask to install it. But first, let’s go through why you’d use Homebrew in the first place.

The normal method of installing tools (including Docker) entails a few steps. First, search the internet for a Docker package. Then you download it and launch it on your Mac. Only once you’ve completed those steps can you use drag-and-drop to install it.

With Homebrew Cask, you can accomplish the same thing with one command. So the primary justification for using Cask is its simplicity. It is less difficult and requires less time.

Why is Handbrew Cask required to install Docker?

If you’ve ever installed software on a Mac the “conventional way,” you’ll recall that it usually entails downloading the package, opening it, and then dragging and dropping it into the Application folder. Homebrew can only install command-line apps by default.

Homebrew Cask is a Homebrew plugin that allows you to install graphical user interface software on your Mac. This means that you can utilize this instead of the traditional download and drag-and-drop method.

Docker Installation on Mac Using Homebrew Cask

Homebrew Installation of Docker Desktop

It is not recommended to install Docker Engine alongside Docker Desktop. The Docker engine, as previously demonstrated, requires VirtualBox, which may conflict with Docker Desktop.

To install Docker Desktop, type the following in the terminal:

  1. Run the following command. It should be noted that the -cask flag is essential for Homebrew to install graphical interface programmes.
  2. After Homebrew has finished installing, type the following command into your terminal to start Docker.
  3. To run Docker Desktop, click the Open button. This prompt will appear when you initially launch Docker Desktop
  4. When prompted, click the OK button to grant Docker Desktop privileged access so that the containers can communicate with one another. By clicking OK, you will install the Docker helper programme, which organises numerous Docker actions for the Docker Engine.

Consider the following items under System Resources:

CPUs– the number of processors available to Docker Desktop. On your Mac, the default value is half of the maximum number.

Raising this number enhances the performance of the container and application. RAM- the amount of memory available to Docker Desktop. The default value is 2 GB.

The swap file size in Docker Desktop. The default is 1 GB, which can be increased or decreased based on the demands of the container and application.

Disk Image Size- The amount of local drive space accessible to Docker Desktop. Disk Image Location – The file system location of the Docker Desktop disc image.

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