Describe the bug
The main page, python.org, refers to Mac OS X. The name of the Apple operating system was changed to macOS some time ago. Please change instances of "Mac OS X" to "macOS".

To Reproduce

1. Visit https://python.org
2. Scroll down near the bottom of the page to view the "Downloads" menu of choices.
3. Notice that "Mac OS X" is an available link. Please change to "macOS" instead.

Expected behavior
All references to the Apple-provided desktop operating system should be "macOS" instead of "Mac OS X."

Desktop (please complete the following information):

• OS: macOS Catalina (10.15.6)
• Browser: Safari (13.1.2)

Screenshots