title: virtualenv does not include pip
body: <p>I am trying to create a virtual environment using <code>virtualenv</code> on Mac OS X El Capitan. I have installed Python 2.7.11 with <code>brew</code>, which includes <code>pip</code>,  <code>wheel</code> and <code>setuptools</code> by default. </p>
  
  <p>Hovewer, when I try to install <code>virtualenv</code> following instructions in the <a href="https://virtualenv.pypa.io/en/latest/installation.html" rel="noreferrer">documentation</a> or from any other resource, I get several problems:</p>
  
  <ol>
  <li><code>virtualenv</code> executable is not placed in <code>/usr/local/bin</code> after <code>pip</code> makes its job, so I need to <code>ln -s</code> it by hand (it may indicate, that there is something wrong with installation on this step). </li>
  <li>After I run <code>virtualenv venv</code>, it creates new environment, catches Python 2.7.11 from <code>brew</code>-installation, but: <em>there is no <code>pip</code> inside <code>bin</code> folder</em>. That means, that if I try <code>which pip</code>, having <code>venv</code> activated, it returns a global position of <code>pip</code> — <code>/usr/local/bin/pip</code>, not <code>/path/to/venv/bin/pip</code>.</li>
  </ol>
  
  <p>As a consequence, installing packages inside <code>venv</code> uses global <code>pip</code> and installs them to a global <code>sites-packages</code>, not that inside <code>venv</code>, and it's quite the opposite of what environment should do. </p>
  
  <p>Could you please suggest what may be wrong and how to fix it?</p>
  
  <p>EDIT: The thing to mention is that I used to have other versions of Python installed on my computer, which I have recently deleted as it is described <a href="https://stackoverflow.com/q/3819449/3885799">in this answer</a>. Maybe it causes the issue, and some more thorough cleaning is needed.</p>