Hey, thanks for the quick response. I have to add that, when going to the download page to download site (https://www.python.org/downloads/) the big yellow button that says "Download Python 3.6.5" downloads the 64-/32-bit installer (at least, I think so as it redirects to https://www.python.org/ftp/python/3.6.5/python-3.6.5-macosx10.6.pkg . You can see the "-macosx10.6" part.) I pressed that when I started coding, not knowing that I had to install a different version.

You can find it when you click on Mac OS X link in the text under the button. Maybe the website could present an option to choose?

And one question: which installer from the list should I choose? There are seemingly hundreds of them.