title: AttributeError running Django site on Mac 11.0.1
body: <p>I'm getting an error running a django site locally that was working fine before I updated my Mac OS to 11.0.1. I'm thinking this update is the cause of the problem since nothing else was really changed between when it was working and now.</p>
  <pre><code>10:15:05 worker.1 | Traceback (most recent call last):
  10:15:05 worker.1 |   File &quot;/usr/local/bin/celery&quot;, line 5, in &lt;module&gt;
  10:15:05 worker.1 |     from celery.__main__ import main
  10:15:05 worker.1 |   File &quot;/usr/local/lib/python2.7/site-packages/celery/__init__.py&quot;, line 133, in &lt;module&gt;
  10:15:05 worker.1 |     from celery import five  # noqa
  10:15:05 worker.1 |   File &quot;/usr/local/lib/python2.7/site-packages/celery/five.py&quot;, line 20, in &lt;module&gt;
  10:15:05 worker.1 |     from kombu.five import monotonic
  10:15:05 worker.1 |   File &quot;/usr/local/lib/python2.7/site-packages/kombu/five.py&quot;, line 56, in &lt;module&gt;
  10:15:05 worker.1 |     absolute_to_nanoseconds = CoreServices.AbsoluteToNanoseconds
  10:15:05 worker.1 |   File &quot;/usr/local/Cellar/python@2/2.7.17_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py&quot;, line 379, in __getattr__
  10:15:05 worker.1 |     func = self.__getitem__(name)
  10:15:05 worker.1 |   File &quot;/usr/local/Cellar/python@2/2.7.17_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py&quot;, line 384, in __getitem__
  10:15:05 worker.1 |     func = self._FuncPtr((name_or_ordinal, self))
  10:15:05 worker.1 | AttributeError: dlsym(RTLD_DEFAULT, AbsoluteToNanoseconds): symbol not found
  </code></pre>
  <p>Here is my brew config</p>
  <pre><code>HOMEBREW_VERSION: 2.6.0
  ORIGIN: https://github.com/Homebrew/brew
  HEAD: 1d5e354cc2ff048bd7161d95b3fa7f91dc9dd081
  Last commit: 2 days ago
  Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
  Core tap HEAD: fdb83fcfb482e5ed1f1c3c442a85b99223fcabeb
  Core tap last commit: 27 hours ago
  Core tap branch: master
  HOMEBREW_PREFIX: /usr/local
  HOMEBREW_CASK_OPTS: []
  HOMEBREW_DISPLAY: /private/tmp/com.apple.launchd.rZ1F30XomO/org.macosforge.xquartz:0
  HOMEBREW_MAKE_JOBS: 8
  Homebrew Ruby: 2.6.3 =&gt; /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
  CPU: octa-core 64-bit icelake
  Clang: 12.0 build 1200
  Git: 2.24.3 =&gt; /Applications/Xcode-beta.app/Contents/Developer/usr/bin/git
  Curl: 7.64.1 =&gt; /usr/bin/curl
  Java: 14.0.2, 1.8.0_265
  macOS: 11.0.1-x86_64
  CLT: 12.3.0.0.1.1605054730
  Xcode: 12.3 =&gt; /Applications/Xcode-beta.app/Contents/Developer
  XQuartz: 2.7.11 =&gt; /opt/X11
  </code></pre>
  <p>Typically I'll run the site with a virtualenv running python 2.7.15, I was getting the same error with that. I reinstalled python with pyenv and remade the virtualenv but the same error appeared. I'm running Django 1.10.8 with Kombu 3.0.37</p>