title: aqua ttk theme missing (macOS Monterey)
body: <p>I am using tkinter on macOS Monterey, I was expecting ttk widgets to look like macOS native windows, but it is not the case. So I had a look at the available default themes:</p>
  <pre><code>import tkinter as tk
  from tkinter import ttk
  
  app = tk.Tk()
  style = ttk.Style(app)
  print(style.theme_names())
  
  ===&gt; ('clam', 'alt', 'default', 'classic')
  </code></pre>
  <p>Isn't &quot;aqua&quot; theme supposed to be native with macOS? Why is it missing?</p>
  <p>Also, my ttk widgets all look like x11/linux-style since I've installed XQuartz (before that, they looked like native macOS windows). It has been months since then, I could not figure out either what happened or how I can go back to previous settings.</p>
  <p>Any suggestion? Do you have an idea why I do not see the aqua theme listed among the ttk themes?</p>
  <p>Thanks!</p>