Homebrew is a software package manager for the Mac. After installing the manager, many utility programs can be installed from the repository.
At the Homebrew website http://brew.sh, copy and paste the long Ruby command into a shell.
Get started with the essential cowsay. Install and check it:
1 2 | brew install cowsay
cowsay This cow like brew!
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Show the packages you have installed:
1 | brew list
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See more command arguments:
1 | brew
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Here are some packages I have installed, and hundreds are available. macOS comes preinstalled with python and ruby, but brew will get you the latest versions in your /usr/local/bin. Brew is much easier than downloading from official websites.