I can confirm the build still fails as @nantille said.
[100%] Linking CXX executable ../../bin/Blender.app/Contents/MacOS/Blender
Undefined symbols for architecture x86_64:
"___isPlatformVersionAtLeast", referenced from:
_py_posix_spawn in libpython3.9.a(posixmodule.o)
_posixmodule_exec in libpython3.9.a(posixmodule.o)
"_preadv", referenced from:
_os_preadv in libpython3.9.a(posixmodule.o)
"_pwritev", referenced from:
_os_pwritev in libpython3.9.a(posixmodule.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [bin/Blender.app/Contents/MacOS/Blender] Error 1
make[2]: *** [source/creator/CMakeFiles/blender.dir/all] Error 2
make[1]: *** [all] Error 2
make: *** [all] Error 2