Python virtualenv on Mac OS X

Installation (version 10.8):

1. Install XCode from apple store
2. Additionally install Xcode Command Line Tools (see screenshot)

XCode packages, command line tools

3. Update ~/.bash_profile

export ARCHFLAGS="-arch x86_64"
export PATH=/usr/local/share/python:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
test -f ~/.bashrc && source ~/.bashrc

4. Install homebrew (the missing package manager for OS X)

ruby -e "$(curl -fsSL"

Homebrew is a package management system that simplifies software installation on the Mac OS X operating system. It is a free/open source software project with goal to simplify installation of other free/open source software.
Homebrew installs packages to his own directory and then symlinks their files into /usr/local.
Run to ensure that installation passed without errors:

brew doctor

5. Install latest python

brew install python --with-brewed-openssl
brew install python3 --with-brewed-openssl

6. Update ~/.bashrc

# virtualenv should use distribute instead of legacy setuptools
# pip should only run if there is a virtualenv currently activated
# cache pip-installed packages to avoid re-downloading
export PIP_DOWNLOAD_CACHE=$HOME/.pip/cache

7. Install virtualenv and other packages You need

pip install virtualenv


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