title: How to install a different version of Python on macOS Monterey
body: <p>I need to run python 3.6 but have 3.9 on my mac, which is running Monterey.</p>
  <pre><code>pyenv install 3.6.9
  </code></pre>
  <p>but i am getting these errors;</p>
  <pre><code>python-build: use openssl@1.1 from homebrew
  python-build: use readline from homebrew
  Downloading Python-3.6.9.tar.xz...
  -&gt; https://www.python.org/ftp/python/3.6.9/Python-3.6.9.tar.xz
  Installing Python-3.6.9...
  python-build: use tcl-tk from homebrew
  python-build: use readline from homebrew
  python-build: use zlib from xcode sdk
  
  BUILD FAILED (OS X 12.3 using python-build 2.2.5-1-ga157725d)
  
  Inspect or clean up the working tree at /var/folders/k1/jjq8zhm90z5by3s9rgzrr5p40000gn/T/python-build.20220317113524.63390
  Results logged to /var/folders/k1/jjq8zhm90z5by3s9rgzrr5p40000gn/T/python-build.20220317113524.63390.log
  
  Last 10 log lines:
  checking for --with-cxx-main=&lt;compiler&gt;... no
  checking for clang++... no
  configure:
  
    By default, distutils will build C++ extension modules with &quot;clang++&quot;.
    If this is not intended, then set CXX on the configure command line.
    
  checking for the platform triplet based on compiler characteristics... darwin
  configure: error: internal configure error for the platform triplet, please file a bug report
  make: *** No targets specified and no makefile found.  Stop.
  </code></pre>
  <p>Additionally, I have also installed xcode command line tools.</p>