Build against Python from precompiled libraries by default, instead of
requiring framework from python.org package install. The resulting bpy module
can still be used with any Python install of the same version.
Use the same CMake find module as Linux. This simplifies code, and makes it
possible to manually set PYTHON_* variables in CMake configuration.
Remove WITH_PYTHON_FRAMEWORK option for regular Blender build, as this doesn't
work well due to missing required Python packages. Advanced users can still
set PYTHON_ROOT_DIR=/Library/Frameworks/Python.framework/Versions/3.10 for
the same result.
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