Homebrew is a package manager for macOS and makes it easy to install software and keep it up to date.
First, install Homebrew. You can find installation instructions and documentation on the brew.sh website.
Install the bundle tap
brew tap homebrew/bundle
Create a Brewfile from all installed packages on your existing system. You can use it to provision a new macOS device.
brew bundle dump
By default, the Brewfile is located at ~/Brewfile.
Install all packages from the specified Brewfile. Software that is already installed is automatically skipped or updated if a newer version is available.
brew bundle install --file=/path/to/Brewfile