Django - ImportError: No module named apps
I found the solution for me. When you write polls.apps.PollsConfig in your InstalledApps, you need to have in mind that, the first polls refers to the created app, not to the site.
In the Django documentation it can be a bit confusing.
I am trying out the Django tutorial on the djangoproject.com website, but when I reach the part where I do the first "makemigrations polls" I keep getting this error:

ImportError: No module named apps


Traceback (most recent call last):
  File "manage.py", line 22, in 
    execute_from_command_line(sys.argv)
  File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
    utility.execute()
  File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 312, in execute
    django.setup()
  File "/Library/Python/2.7/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/Library/Python/2.7/site-packages/django/apps/registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
  File "/Library/Python/2.7/site-packages/django/apps/config.py", line 112, in create
    mod = import_module(mod_path)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)

How can I resolve this error?