Not working on windows

[MewX]

when installing packages on python 3.7

$ pip --version
pip 18.1 from d:\python37\lib\site-packages\pip (python 3.7)

  Using cached https://files.pythonhosted.org/packages/9c/3c/09d2c37e3266fc7d1b0b2e46df838cf7603adca85d5132382a36e1e0b0c3/pyobjc-core-4.2.2.tar.gz
    Complete output from command python setup.py egg_info:
    running egg_info
    C:\...\pip-install-1ungkppb\pyobjc-core\setup.py:624: DeprecationWarning: This method will be removed in future versions.  Use 'parser.read_file()' instead.
      cfg.readfp(fp)
error: PyObjC requires macOS to build

[ao]

You may be interested in the Java version, which is cross-platform: https://github.com/ao/ktmm-java