title: Jupyter install fails on Mac
body: <p>I'm trying to install Jupyter on my Mac (OS X El Capitan) and I'm getting an error in response to:</p>
  
  <pre><code>sudo pip install -U jupyter
  </code></pre>
  
  <p>At first the download/install starts fine, but then I run into this:</p>
  
  <pre><code>Installing collected packages: six, singledispatch, certifi, backports-abc, tornado, jupyter-core, pyzmq, jupyter-client, functools32, jsonschema, nbformat, pygments, mistune, MarkupSafe, jinja2, nbconvert, path.py, pickleshare, simplegeneric, setuptools, gnureadline, appnope, ptyprocess, pexpect, ipython, ipykernel, terminado, notebook, ipywidgets, jupyter-console, qtconsole, jupyter
    Found existing installation: six 1.4.1
      DEPRECATION: Uninstalling a distutils installed project (six) has been deprecated and will be removed in a future version. This is due to the fact that uninstalling a distutils project will only partially uninstall the project.
      Uninstalling six-1.4.1:
  Exception:
  Traceback (most recent call last):
    File "/Library/Python/2.7/site-packages/pip/basecommand.py", line 209, in main
      status = self.run(options, args)
    File "/Library/Python/2.7/site-packages/pip/commands/install.py", line 317, in run
      prefix=options.prefix_path,
    File "/Library/Python/2.7/site-packages/pip/req/req_set.py", line 726, in install
      requirement.uninstall(auto_confirm=True)
    File "/Library/Python/2.7/site-packages/pip/req/req_install.py", line 746, in uninstall
      paths_to_remove.remove(auto_confirm)
    File "/Library/Python/2.7/site-packages/pip/req/req_uninstall.py", line 115, in remove
      renames(path, new_path)
    File "/Library/Python/2.7/site-packages/pip/utils/__init__.py", line 267, in renames
      shutil.move(old, new)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 302, in move
      copy2(src, real_dst)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 131, in copy2
      copystat(src, dst)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 103, in copystat
      os.chflags(dst, st.st_flags)
  OSError: [Errno 1] Operation not permitted: '/tmp/pip-ByX5xW-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/six-1.4.1-py2.7.egg-info'
  </code></pre>
  
  <p>What can I do to fix this?</p>