title: OSError: [Errno 13] Permission denied installing TensorFlow with Anaconda
body: <p>I followed the instruction from TensorFlow's official site:</p>
  
  <pre><code>sudo pip install --upgrade https://storage.googleapis.com/tensorflow/mac/tensorflow-0.8.0-py2-none-any.whl
  </code></pre>
  
  <p>But I got this error:</p>
  
  <pre><code>OSError: [Errno 13] Permission denied:
  
  '/Users/myname/anaconda/lib/python2.7/site-packages/external/__init__.py'
  </code></pre>
  
  <p>After re-insalling anaconda, got a different error</p>
  
  <pre><code>Installing collected packages: setuptools, protobuf, numpy, tensorflow
    Found existing installation: setuptools 20.3
  Cannot remove entries from nonexistent file /anaconda/lib/python2.7/site-packages/easy-install.pth
  </code></pre>