The macOS downloads for Sage version 9.1 include variants with and without "py2" in the name. The installation instructions and the macOS readme in the top level directory don't indicate what this is for.
Which version would be appropriate for first time use on a Mojave machine? Is py2 there only for people who aren't ready for python 3?
Also, where's the best place to file a bug/suggestion about including an explanation on the download page?