title: can OpenCV be installed in python virtualenv on Mac Mountain Lion
body: <p>I have install Numpy and Scipy with virtualenv on my mac. </p>
  
  <p>Today, I want to installed Opencv under virtualenv. 
  I try:</p>
  
  <pre><code>pip install pyopencv
  </code></pre>
  
  <p>the terminal returned: </p>
  
  <p>Could not find a version that satisfies the requirement pyopencv (from versions: 2.0.wr1.0.1-demo, 2.0.wr1.0.1, 2.0.wr1.1.0, 2.1.0.wr1.0.0, 2.1.0.wr1.0.1, 2.1.0.wr1.0.2, 2.1.0.wr1.1.0, 2.1.0.wr1.2.0, 2.1.0.wr1.2.0-demo, 2.1.0.wr1.2.0)
  Cleaning up...
  No distributions matching the version for pyopencv</p>