title: Mac USD usdview 'python' is dying
body: <p>I have installed USD on my Mac after a long battle. Finally it reaches the point where it said <code>Success...add xx to your PATH and PYTHONPATH</code>. I did this.</p>
  <p>But when I now run <code>usdview</code> (through terminal OR by going to the execution file in the finder and clicking it) I get this error:</p>
  <pre><code>(base) MacBook-Pro-2:USD-20.11 x$ usdview
  
  ------------------------ 'python' is dying ------------------------
  python crashed. FATAL ERROR: Failed axiom: ' Py_IsInitialized() '
  in operator() at line 148 of /Users/x/Documents/x/USD-20.11/pxr/base/tf/pyTracing.cpp
  
  The stack can be found in MacBook-Pro-2:/var/folders/xz/lfv32q8944s8gvb7zwlppkkm0000gq/T//st_python.37044
  done.
  ------------------------------------------------------------------
  Abort trap: 6
  </code></pre>
  <p>Does anyone know what this cause of this might be? I have been battling a long time without any success :(</p>