title: Unable to import psutil in Python 3.7 (Import Error)
body: <p>I am unable to import psutil when I activated python on my venv, its gives the following error message, which I cant resolve.</p>
  
  <p>I tried to uninstall psutil and install psutil again but it still returns the same error. </p>
  
  <pre><code>&gt;&gt;&gt; import psutil
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "/Users/wenlin.kwek/Documents/fp_churn/venv/lib/python3.7/site-packages/psutil/__init__.py", line 157, in &lt;module&gt;
      from . import _psosx as _psplatform
    File "/Users/wenlin.kwek/Documents/fp_churn/venv/lib/python3.7/site-packages/psutil/_psosx.py", line 16, in &lt;module&gt;
      from . import _psutil_osx as cext
  ImportError: dlopen(/Users/wenlin.kwek/Documents/fp_churn/venv/lib/python3.7/site-packages/psutil/_psutil_osx.cpython-37m-darwin.so, 2): Symbol not found: _kIOMasterPortDefault
    Referenced from: /Users/wenlin.kwek/Documents/fp_churn/venv/lib/python3.7/site-packages/psutil/_psutil_osx.cpython-37m-darwin.so
    Expected in: flat namespace
   in /Users/wenlin.kwek/Documents/fp_churn/venv/lib/python3.7/site-packages/psutil/_psutil_osx.cpython-37m-darwin.so
  </code></pre>
  
  <p>Will appreciate if anyone knows how to resolve this issue, thanks.</p>