title: Install Twisted in Mac OS/X 1.8.5 for Python 2.7
body: <p>Some version, first:</p>
  
  <p>mac osx version:</p>
  
  <pre><code>$ system_profiler SPSoftwareDataType
  Software:
  
      System Software Overview:
  
        System Version: OS X 10.8.5 (12F45)
        Kernel Version: Darwin 12.5.0
        Boot Volume: Macintosh HD
        Boot Mode: Normal
  </code></pre>
  
  <p>python:</p>
  
  <pre><code>$ python
  Python 2.7.2 (default, Oct 11 2012, 20:14:37)
  [GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] on darwin
  </code></pre>
  
  <p>zope:</p>
  
  <pre><code>&gt;&gt;&gt; import zope
  &gt;&gt;&gt; zope.__path__
  ['/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/zope', '/Library/Python/2.7/site-packages/zope.interface-4.1.1-py2.7-macosx-10.8-intel.egg/zope']
  </code></pre>
  
  <p>So.. Max 1.8.5 with python 2.7 and zope 4.1</p>
  
  <p>then.. <strong>the problem</strong>:</p>
  
  <pre><code>&gt;&gt;&gt; import twisted
      Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "/Library/Python/2.7/site-packages/twisted/__init__.py", line 53, in &lt;module&gt;
      _checkRequirements()
    File "/Library/Python/2.7/site-packages/twisted/__init__.py", line 51, in _checkRequirements
      raise ImportError(required + ".")
  ImportError: Twisted requires zope.interface 3.6.0 or later.
  </code></pre>
  
  <p>For sure I have messed up something with <code>sudo</code> executing python setup.py install, easy_install, pip, and other but.. the question is:</p>
  
  <p>How to install an updated version of twisted?</p>