title: PIP permission denied on Mac OSX even with --user
body: <p>I've recently come to know the terrors of using pip with sudo to install packages. Instead, it is recommended using the --user flag. The problem is that even with the user flag I can't install ANYTHING with PIP, accusing of permission denied. Anyone ever had this problem before?</p>
  
  <p>Here's a little demo of the error when trying to install the package Cython:</p>
  
  <pre><code>OSError: [Errno 13] Permission denied: '/Users/myusername/Library/Python/2.7'
  </code></pre>
  
  <p>Thank you in advance for your help.</p>
  
  <p>P.S: I know about the alternative of using a virtualenv, but I really wanna stick to using pip on the clear.</p>
  
  <p>Edit: It turns out I have access to /Library/Python but not to ~/Library/Python. Which seems strange to me, why would I have access to systemwide files but not to my own? Is this normal?</p>