trying to get virtualenv installed on my MacBook Pro, running OS X El Capitan..

virtualenv_madness

Its already installed:

$ pip install virtualenv
Requirement already satisfied (use --upgrade to upgrade): virtualenv in ./Library/Python/2.7/lib/python/site-packages

But it doesn't work

$ virtualenv
-bash: virtualenv: command not found


[2016-08-16 13:49:34]
kellys04@gtcmbp05:~$ pip uninstall virtualenv
Uninstalling virtualenv-15.0.3:
  /Users/kellys04/Library/Python/2.7/bin/virtualenv
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv-15.0.3.dist-info/DESCRIPTION.rst
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv-15.0.3.dist-info/INSTALLER
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv-15.0.3.dist-info/METADATA
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv-15.0.3.dist-info/RECORD
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv-15.0.3.dist-info/WHEEL
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv-15.0.3.dist-info/entry_points.txt
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv-15.0.3.dist-info/metadata.json
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv-15.0.3.dist-info/top_level.txt
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv.py
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv.pyc
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/__init__.py
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/__init__.pyc
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/argparse-1.4.0-py2.py3-none-any.whl
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/pip-8.0.2-py2.py3-none-any.whl
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/pip-8.1.2-py2.py3-none-any.whl
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/setuptools-19.6.2-py2.py3-none-any.whl
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/setuptools-22.0.5-py2.py3-none-any.whl
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/wheel-0.26.0-py2.py3-none-any.whl
  /Users/kellys04/Library/Python/2.7/lib/python/site-packages/virtualenv_support/wheel-0.29.0-py2.py3-none-any.whl
Proceed (y/n)? y
  Successfully uninstalled virtualenv-15.0.3

[2016-08-16 13:49:55]
kellys04@gtcmbp05:~$ pip --version
pip 8.1.2 from /usr/local/lib/python2.7/site-packages (python 2.7)

[2016-08-16 13:51:13]
kellys04@gtcmbp05:~$ virtualenv
-bash: virtualenv: command not found

[2016-08-16 13:57:16]
kellys04@gtcmbp05:~$ pip install --user virtualenv
Collecting virtualenv
  Using cached virtualenv-15.0.3-py2.py3-none-any.whl
Installing collected packages: virtualenv
Successfully installed virtualenv-15.0.3

[2016-08-16 13:57:38]
kellys04@gtcmbp05:~$ virtualenv
-bash: virtualenv: command not found

[2016-08-16 13:57:45]
kellys04@gtcmbp05:~$ python --version
Python 2.7.10

[2016-08-16 13:58:04]
kellys04@gtcmbp05:~$ which python
/usr/local/bin/python



$ pip uninstall virtualenv
Uninstalling virtualenv-15.0.3:
  /Users/kellys04/Library/Python/2.7/bin/virtualenv
  ...
  ...
  
$ pip install virtualenv
Collecting virtualenv
  Using cached virtualenv-15.0.3-py2.py3-none-any.whl
Installing collected packages: virtualenv
Successfully installed virtualenv-15.0.3


NOW IT WORKS ???


$ which virtualenv
/usr/local/bin/virtualenv


[2016-08-16 14:06:16]
kellys04@gtcmbp05:~$ virtualenv
You must provide a DEST_DIR
Usage: virtualenv [OPTIONS] DEST_DIR

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -v, --verbose         Increase verbosity.
  -q, --quiet           Decrease verbosity.
  -p PYTHON_EXE, --python=PYTHON_EXE