title: Anaconda/MacOS: Change default python version
body: <p>I was using python with anaconda on osx 10.8 when spyder crashed. When I tried to restart it, the launcher showed it as uninstalled. I figured there might be something wrong with anaconda, so I restarted my computer, but the problem persisted.</p>
  
  <p>Looking into it, I noticed the default version of python had been changed:</p>
  
  <pre><code>$ python --version
  Python 3.4.1 :: Continuum Analytics, Inc.
  </code></pre>
  
  <p>I tried changing it back by using Apple's <code>defaults write</code>, relinking python with <code>ln -sf</code>, simply setting an <code>alias python=python2.7</code>, to no effect.</p>
  
  <p>Then I tried removing python3 with conda, but <code>conda remove python3</code> won't do the trick. Searching for packages produces this:</p>
  
  <pre><code>$ conda search python
  Fetching package metadata: ..
  (...)
  python                       1.0.1                         0  defaults        
                               (...)
                            .  2.7.5                         2  defaults        
                            .  2.7.5                         3  defaults        
                               (...)
                            *  3.4.1                         0  defaults        
  </code></pre>
  
  <p>I also looked up Continuum docs, and they recommend leaving 2.7 as standard and using an Anaconda environment if I want to use a different version, which doesn't help me.</p>
  
  <p>Does anybody have any idea of how to change default version back to 2.7?</p>
  
  <p>(Specs are: anaconda 1.7.0, osx 10.8.5, conda 3.5.2)</p>