Trouble using mkvirtualenv after installing OS X Mavericks
Question: I recently installed OS X Mavericks. I can access my previously created
virtual environments, but I have trouble creating a new one:

    
    
    Christophers-MacBook-Pro-2:~ christopherspears$ mkvirtualenv bottle_todo
    -bash: /usr/local/bin/virtualenv: /usr/local/opt/python/bin/python2.7: bad interpreter: No such file or directory
    

I looked into /usr/local/bin/virtualenv:

    
    
    #!/usr/local/opt/python/bin/python2.7
    # EASY-INSTALL-ENTRY-SCRIPT: 'virtualenv==1.10.1','console_scripts','virtualenv'
    __requires__ = 'virtualenv==1.10.1'
    import sys
    from pkg_resources import load_entry_point
    
    if __name__ == '__main__':
        sys.exit(
            load_entry_point('virtualenv==1.10.1', 'console_scripts', 'virtualenv')()
        )
    

Sure enough the path /usr/local/opt/python/bin/python2.7 does not exit.
Earlier on, I had this issue:

[Terminal issue with virtualenvwrapper after Mavericks
Upgrade](http://stackoverflow.com/questions/19549824/terminal-issue-with-
virtualenvwrapper-after-mavericks-upgrade/19550535#19550535)

I tried updating virtualenv to no avail:

    
    
    christohersmbp2:~ christopherspears$ pip install virtualenv
    Requirement already satisfied (use --upgrade to upgrade): virtualenv in /Library/Python/2.7/site-packages
    Cleaning up...
    christohersmbp2:~ christopherspears$ pip install --upgrade virtualenv
    Requirement already up-to-date: virtualenv in /Library/Python/2.7/site-packages
    Cleaning up...
    christohersmbp2:~ christopherspears$ mkvirtualenv test
    -bash: /usr/local/bin/virtualenv: /usr/local/opt/python/bin/python2.7: bad interpreter: No such file or directory
    


Answer: I fixed it. I had to uninstall and reinstall virtualenv:

    
    
    christohersmbp2:bin christopherspears$ sudo pip uninstall virtualenv
    Password:
    Uninstalling virtualenv:
      /Library/Python/2.7/site-packages/virtualenv-1.11.4.dist-info/DESCRIPTION.rst
      /Library/Python/2.7/site-packages/virtualenv-1.11.4.dist-info/METADATA
      /Library/Python/2.7/site-packages/virtualenv-1.11.4.dist-info/RECORD
      /Library/Python/2.7/site-packages/virtualenv-1.11.4.dist-info/WHEEL
      /Library/Python/2.7/site-packages/virtualenv-1.11.4.dist-info/entry_points.txt
      /Library/Python/2.7/site-packages/virtualenv-1.11.4.dist-info/pydist.json
      /Library/Python/2.7/site-packages/virtualenv-1.11.4.dist-info/top_level.txt
      /Library/Python/2.7/site-packages/virtualenv.py
      /Library/Python/2.7/site-packages/virtualenv.pyc
      /Library/Python/2.7/site-packages/virtualenv_support/__init__.py
      /Library/Python/2.7/site-packages/virtualenv_support/__init__.pyc
      /Library/Python/2.7/site-packages/virtualenv_support/pip-1.5.4-py2.py3-none-any.whl
      /Library/Python/2.7/site-packages/virtualenv_support/setuptools-2.2-py2.py3-none-any.whl
      /usr/local/bin/virtualenv
      /usr/local/bin/virtualenv-2.7
    Proceed (y/n)? y
      Successfully uninstalled virtualenv
    christohersmbp2:bin christopherspears$ sudo pip install virtualenv
    Downloading/unpacking virtualenv
      Downloading virtualenv-1.11.4-py2.py3-none-any.whl (1.7MB): 1.7MB downloaded
    Installing collected packages: virtualenv
    Successfully installed virtualenv
    Cleaning up...
    

Now everything seems to work:

    
    
    christohersmbp2:bin christopherspears$ cat virtualenv
    #!/usr/bin/python
    
    # -*- coding: utf-8 -*-
    import re
    import sys
    
    from virtualenv import main
    
    if __name__ == '__main__':
        sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
        sys.exit(main())
    christohersmbp2:bin christopherspears$ mkvirtualenv test
    New python executable in test/bin/python
    Installing setuptools, pip...done.
    
    (test)christohersmbp2:bin christopherspears$ deactivate
    christohersmbp2:bin christopherspears$ workon
    bottle_tutorial
    rango_tutorial
    scrapestat
    test
    christohersmbp2:bin christopherspears$ rmvirtualenv test
    Removing test...
    

