Install Homebrew

 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

• 
  Homebrew installs the stuff you need that Apple (or your Linux system) didn’t.

  $ brew install wget

• Homebrew installs packages to their own directory and then symlinks their files into /opt/homebrew (on Apple Silicon).

  $ cd /opt/homebrew
  $ find Cellar
  Cellar/wget/1.16.1
  Cellar/wget/1.16.1/bin/wget
  Cellar/wget/1.16.1/share/man/man1/wget.1
  
  $ ls -l bin
  bin/wget -> ../Cellar/wget/1.16.1/bin/wget

• Homebrew won’t install files outside its prefix and you can place a Homebrew installation wherever you like.

• Trivially create your own Homebrew packages.

  $ brew create https://foo.com/foo-1.0.tgz
  Created /opt/homebrew/Library/Taps/homebrew/homebrew-core/Formula/foo.rb

• It’s all Git and Ruby underneath, so hack away with the knowledge that you can easily revert your modifications and merge upstream updates.

  $ brew edit wget # opens in $EDITOR!

• Homebrew formulae are simple Ruby scripts:

  class Wget < Formula
    desc "Internet file retriever"
    homepage "https://www.gnu.org/software/wget/"
    url "https://ftp.gnu.org/gnu/wget/wget-1.24.5.tar.gz"
    sha256 "fa2dc35bab5184ecbc46a9ef83def2aaaa3f4c9f3c97d4bd19dcb07d4da637de"
    license "GPL-3.0-or-later"
  
    def install
      system "./configure", "--prefix=#{prefix}"
      system "make", "install"
    end
  end

• Homebrew complements macOS (or your Linux system). Install your RubyGems with gem and their dependencies with brew.

• “To install, drag this icon…” no more. Homebrew Cask installs macOS apps, fonts and plugins and other non-open source software.

  $ brew install --cask firefox

• Making a cask is as simple as creating a formula.

  $ brew create --cask https://foo.com/foo-1.0.dmg
  Editing /opt/homebrew/Library/Taps/homebrew/homebrew-cask/Casks/foo.rb