User blog comment:RansomTime/An introduction to Pywikipediabot/@comment-188432-20120723234141

As an aside, the Python that comes standard with Mac OS 10.7 (Lion) is deprecated. You can still use pywikipediabot with that version, but you get an annoying message every time you run the bot saying, effectively, "Hey, go upgrade Python". And there's certainly no support for the versions of Python that are standard to earlier versions of Mac OS, which many people still run.

So, although it's sorta true that you can skip the step of setting up Python if you use a Mac, you're probably going to have to install an update almost immediately, even if you're running a Mac that you literally just took out of the box today.