Install Graphical Apps With Homebrew Cask It uses Homebrew to install Cask: brew install caskroom/cask/brew-cask Once you’re done, run the following command to install Homebrew Cask. Homebrew Cask is now automatically installed as part of Homebrew itself. UPDATE: The below command is no longer necessary. Run the following command once you’re done to ensure Homebrew is installed and working properly: brew doctor By default, it installs Homebrew so you can use the brew command without typing the sudo command and providing your password. Press Enter and then provide your password to install it. if you run the ruby script using the command above, it will ask you to run the following command: /bin/bash -c '$(curl -fsSL )' Update: Run the following command instead.