title: Django points to the wrong version of Postgres
body: <p>I downgraded Postgres.app from 9.6 to 9.5 by removing the Postgres.app desktop app. I updated the database by doing</p>
  
  <p>(I downloaded Postgres by downloading Postgres.app Desktop app and I installed Django by doing pip install Django)</p>
  
  <pre><code>sudo /usr/libexec/locate.updatedb
  </code></pre>
  
  <p>And it looks like it is initiating database from the right directory.</p>
  
  <pre><code>/Applications/Postgres.app/Contents/Versions/9.5/bin/initdb
  /Applications/Postgres.app/Contents/Versions/9.5/share/doc/postgresql/html/app-initdb.html
  /Applications/Postgres.app/Contents/Versions/9.5/share/man/man1/initdb.1
  </code></pre>
  
  <p>However, when I am trying to do a migration in my Django app, it looks like the path is still point to the 9.6 version of Postgress</p>
  
  <pre><code>Traceback (most recent call last):
    File "manage.py", line 22, in &lt;module&gt;
      execute_from_command_line(sys.argv)
    File "/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
      utility.execute()
    File "/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/django/core/management/__init__.py", line 341, in execute
      django.setup()
    File "/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/django/__init__.py", line 27, in setup
      apps.populate(settings.INSTALLED_APPS)
    File "/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
      app_config.import_models(all_models)
    File "/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/django/apps/config.py", line 199, in import_models
      self.models_module = import_module(models_module_name)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
      __import__(name)
    File "/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/tenant_schemas/models.py", line 4, in &lt;module&gt;
      from tenant_schemas.postgresql_backend.base import _check_schema_name
    File "/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/tenant_schemas/postgresql_backend/base.py", line 14, in &lt;module&gt;
      import psycopg2
    File "/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/psycopg2/__init__.py", line 50, in &lt;module&gt;
      from psycopg2._psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
  ImportError: dlopen(/Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/psycopg2/_psycopg.so, 2): Library not loaded: /Applications/Postgres.app/Contents/Versions/9.6/lib/libpq.5.dylib
    Referenced from: /Users/me/Desktop/myapp/venv/lib/python2.7/site-packages/psycopg2/_psycopg.so
    Reason: image not found
  </code></pre>