This is documentation for an experimental rewrite of py2app, and is not relevant for public releases of py2app.
I expect to support macOS 10.9 or later with this project, for 32-bit and 64-bit binaries (including fat binaries).
This will at initially support Python 3.6 and later, support for older versions will be added later when this can be done without cluttering source coe (Python 2.7 may not be supported at ever).