title: pip install django error
body: <p>I'm trying to install <strong>django</strong> using <strong>pip</strong> in Terminal.</p>
  
  <p>I always get an exception, however. The last error is always "permission denied", and I do not understand why. Any help is appreciated.</p>
  
  <p>Log:</p>
  
  <pre><code>pip install django
  You are using pip version 7.1.0, however version 8.1.0 is available.
  You should consider upgrading via the 'pip install --upgrade pip' command.
  Collecting django
    Using cached Django-1.9.4-py2.py3-none-any.whl
  Installing collected packages: django
  Exception:
  Traceback (most recent call last):
    File "/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg/pip/basecommand.py", line 223, in main
      status = self.run(options, args)
    File "/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg/pip/commands/install.py", line 299, in run
      root=options.root_path,
    File "/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg/pip/req/req_set.py", line 646, in install
      **kwargs
    File "/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg/pip/req/req_install.py", line 813, in install
      self.move_wheel_files(self.source_dir, root=root)
    File "/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg/pip/req/req_install.py", line 1008, in move_wheel_files
      isolated=self.isolated,
    File "/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg/pip/wheel.py", line 339, in move_wheel_files
      clobber(source, lib_dir, True)
    File "/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg/pip/wheel.py", line 310, in clobber
      ensure_dir(destdir)
    File "/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg/pip/utils/__init__.py", line 70, in ensure_dir
      os.makedirs(path)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 157, in makedirs
      mkdir(name, mode)
  OSError: [Errno 13] Permission denied: '/Library/Python/2.7/site-packages/django'
  </code></pre>