To install pip, virtual environment (virtualenv, virtualenvwrapper) on OS X, do the following on the command line:
sudo easy_install pip sudo pip install virtualenv sudo pip install virtualenvwrapper
To enable the workon tab-completion feature, append the following to your profile file (located at ~/.profile):
source /usr/local/bin/virtualenvwrapper.sh
Create a directory to house the virtual environments:
mkdir ~/.virtualenvs
Create a new virtual environment for your project:
cd ~/.virtualenvs virtualenv --no-site-packages myproject
NOTE: Apple’s development tools needs to be installed: Xcode http://itunes.apple.com/us/app/xcode/id448457090
The “installer” only downloads the file to Applications — you still need to install Xcode.
Running the installer normally may freeze. If so, right click and choose “Show Package Contents” then look for Xcode.mpkg in /Applications/Install Xcode.app/Contents/Resources/Xcode.mpkg and run that instead.