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brew/docs/Installation.md
Mike McQuaid 03ace9b110 Require more HTTP mirrors for old OS X versions. 
This allows the bootstrap of `curl` and `git` on versions of Mac OS X
that cannot reliably download from HTTPS servers any longer. Once these
are both installed users are able to update Homebrew and download files
securely.

Also, as we're doing this, don't point 10.5 users to Tigerbrew as they
are already given caveats for using Homebrew itself.
2017-09-14 19:58:37 +01:00

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Installation

The suggested and easiest way to install Homebrew is on the homepage.

The standard script installs Homebrew to /usr/local so that you don’t need sudo when you brew install. It is a careful script; it can be run even if you have stuff installed to /usr/local already. It tells you exactly what it will do before it does it too. And you have to confirm everything it will do before it starts.

Requirements

  • An Intel CPU 1
  • OS X 10.10 or higher 2
  • Command Line Tools (CLT) for Xcode: xcode-select --install, developer.apple.com/downloads or Xcode 3
  • A Bourne-compatible shell for installation (e.g. bash or zsh) 4

Alternative Installs

Untar anywhere

Just extract (or git clone) Homebrew wherever you want. Just avoid:

  • Directories with names that contain spaces. Homebrew itself can handle spaces, but many build scripts cannot.
  • /sw and /opt/local because build scripts get confused when Homebrew is there instead of Fink or MacPorts, respectively.

However do yourself a favor and install to /usr/local. Some things may not build when installed elsewhere. One of the reasons Homebrew just works relative to the competition is because we recommend installing to /usr/local. Pick another prefix at your peril!

mkdir homebrew && curl -L https://github.com/Homebrew/brew/tarball/master | tar xz --strip 1 -C homebrew

Multiple installations

Create a Homebrew installation wherever you extract the tarball. Whichever brew command is called is where the packages will be installed. You can use this as you see fit, e.g. a system set of libs in /usr/local and tweaked formulae for development in ~/homebrew.

Uninstallation

Uninstallation is documented in the FAQ.

1 Not all formulae have CPU or OS requirements, but you can assume you will have trouble if you don’t conform. Also, you can find PowerPC and Tiger branches from other users in the fork network. See Interesting Taps and Forks.

2 10.10 or higher is recommended. 10.5–10.9 are supported on a best-effort basis. For 10.4 see Tigerbrew.

3 Most formulae require a compiler. A handful require a full Xcode installation. You can install Xcode, the CLT, or both; Homebrew supports all three configurations. Downloading Xcode may require an Apple Developer account on older versions of Mac OS X. Sign up for free here.

4 The one-liner installation method found on brew.sh requires a Bourne-compatible shell (e.g. bash or zsh). Notably, fish, tcsh and csh will not work.