Python Apple Support

This is a meta-package for building a version of Python that can be embedded into a macOS, iOS, tvOS or watchOS project.

This branch builds a packaged version of Python 3.11.0. Other Python versions are available by cloning other branches of the main repository:

• Python 3.8
• Python 3.9
• Python 3.10
• Python 3.11

It works by downloading, patching, and building a fat binary of Python and selected pre-requisites, and packaging them as static libraries that can be incorporated into an XCode project. The binary modules in the Python standard library are statically compiled, but are distribted as .so objects that can be dynamically loaded at runtime.

It exposes almost all the modules in the Python standard library except for:

• dbm.gnu
• tkinter
• readline
• nis (Deprecated by PEP594)
• ossaudiodev (Deprecated by PEP594)
• spwd (Deprecated by PEP594)

The following standard library modules are available on macOS, but not the other Apple platforms:

• curses
• grp
• multiprocessing
• posixshmem
• posixsubprocess
• syslog

The binaries support x86_64 and arm64 for macOS; arm64 for iOS and appleTV devices; and arm64_32 for watchOS. It also supports device simulators on both x86_64 and M1 hardware. This should enable the code to run on:

• macOS 10.15 (Catalina) or later, on:

  • MacBook (including MacBooks using Apple Silicon)
  • iMac (including iMacs using Apple Silicon)
  • Mac Mini (including M1 Apple Silicon Mac minis)
  • Mac Studio (all models)
  • Mac Pro (all models)

• iOS 12.0 or later, on:

  • iPhone (6s or later)
  • iPad (5th gen or later)
  • iPad Air (all models)
  • iPad Mini (2 or later)
  • iPad Pro (all models)
  • iPod Touch (7th gen or later)

• tvOS 9.0 or later, on Apple TV (4th gen or later)
• watchOS 4.0 or later, on Apple Watch (4th gen or later)

Quickstart

The easist way to use these packages is by creating a project with Briefcase. Briefcase will download pre-compiled versions of these support packages, and add them to an XCode project (or pre-build stub application, in the case of macOS).

Pre-built versions of the frameworks can be downloaded for macOS, for iOS, for tvOS, and for watchOS, and added to your project.

Alternatively, to build the frameworks on your own, download/clone this repository, and then in the root directory, and run:

• make (or make all) to build everything.
• make macOS to build everything for macOS.
• make iOS to build everything for iOS.
• make tvOS to build everything for tvOS.
• make watchOS to build everything for watchOS.

This should:

1. Download the original source packages
2. Patch them as required for compatibility with the selected OS
3. Build the packages as XCode-compatible XCFrameworks.

The resulting support packages will be packaged as a .tar.gz file in the dist folder.

Each support package contains:

• VERSIONS, a text file describing the specific versions of code used to build the support package;
• Python.xcframework, a multi-architecture build of libPython3.11.a
• python-stdlib, the code and binary modules comprising the Python standard library. On iOS, tvOS and watchOS, there are 2 copies of every binary module - one for physical devices, and one for the simulator. The simulator binaries are "fat", containing code for both x86_64 and arm64.

Non-macOS platforms also contain a platform-site folder. This contains a site customization script that can be used to make your local Python install look like it is an on-device install. This is needed because when you run pip you'll be on a macOS machine; if pip tries to install a binary package, it will install a macOS binary wheel (which won't work on iOS/tvOS/watchOS). However, if you add the platform-site folder to your PYTHONPATH when invoking pip, the site customization will make your Python install return platform and sysconfig responses consistent with on-device behavior, which will cause pip to install platform-appropriate packages.

For a detailed instructions on using the support package in your own project, see the usage guide

Building binary wheels

When building binary wheels, you may need to use the libraries built by this project as inputs (e.g., the cffi module uses libffi). To support this, this project is able to package these dependencies as "wheels" that can be added to the server/pypi/dist directory of the binary dependency builder project.

To build these wheels, run:

• make wheels to make all wheels for all mobile platforms
• make wheels-iOS to build all the iOS wheels
• make wheels-tvOS to build all the tvOS wheels
• make wheels-watchOS to build all the watchOS wheels

Historical support

The following versions were supported in the past, but are no longer maintained:

• Python 2.7 (EOL January 2020)
• Python 3.4 (EOL March 2019)
• Python 3.5 (EOL February 2021)
• Python 3.6 (EOL December 2021)
• Python 3.7 (EOL September 2022)