title: How to get github-action Tkinter version >= 8.6 [MACOS]?
body: <p>I'm trying to install <code>ttkthemes</code>, which depends on Tkinter &gt;= 8.6.</p>
  <p>I have the following minimal working example to show the issue:</p>
  <pre><code>jobs:
    demo:
      # I have also tried macOS-11 here, the same result
      runs-on: macOS-latest
  
      steps:
        - name: Setup Python
          uses: actions/setup-python@v2.2.2
          with:
            #Tried 3.8 here as well
            python-version: 3.9
          
        - name: Show TKinter version
          run: |
            python3 -c 'import tkinter; tcl = tkinter.Tcl(); print(tcl.call(&quot;info&quot;, &quot;patchlevel&quot;))'
  </code></pre>
  <p>So far, I've tried countless approaches:</p>
  <ul>
  <li><code>brew install tcl-tk</code>: Useless, its already installed and reinstallation doesn't change anything</li>
  <li><code>brew reinstall python</code></li>
  <li><code>brew install python-tk@3.9</code></li>
  </ul>
  <p>I just can't get it to work, and would highly appreciate any input!</p>