title: Jupyter notebook permission error
body: <p>I'm having some issues with opening Jupyter. I just installed Anaconda, but got the same error as before when I try to write "Jupyter notebook" in terminal.</p>
  
  <pre><code>Johans-MBP:~ JDMac$ Jupyter notebook
  Traceback (most recent call last):
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 501, in get
      value = obj._trait_values[self.name]
  KeyError: 'runtime_dir'
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "/Users/JDMac/anaconda3/bin/jupyter-notebook", line 6, in &lt;module&gt;
      sys.exit(notebook.notebookapp.main())
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/jupyter_core/application.py", line 267, in launch_instance
      return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/traitlets/config/application.py", line 588, in launch_instance
      app.initialize(argv)
    File "&lt;decorator-gen-7&gt;", line 2, in initialize
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/traitlets/config/application.py", line 74, in catch_config_error
      return method(app, *args, **kwargs)
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/notebook/notebookapp.py", line 1021, in initialize
      self.init_configurables()
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/notebook/notebookapp.py", line 815, in init_configurables
      connection_dir=self.runtime_dir,
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 529, in __get__
      return self.get(obj, cls)
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 508, in get
      value = self._validate(obj, dynamic_default())
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/jupyter_core/application.py", line 99, in _runtime_dir_default
      ensure_dir_exists(rd, mode=0o700)
    File "/Users/JDMac/anaconda3/lib/python3.5/site-packages/ipython_genutils/path.py", line 167, in ensure_dir_exists
      os.makedirs(path, mode=mode)
    File "/Users/JDMac/anaconda3/lib/python3.5/os.py", line 241, in makedirs
      mkdir(name, mode)
  PermissionError: [Errno 13] Permission denied: '/Users/JDMac/Library/Jupyter/runtime'
  </code></pre>
  
  <p>As I'm close to clueless with all of this, I need some assistance over here :)</p>