lilypond-darwin-64 app doesn't work on Mac OS Lion

[Werner LEMBERG]

For fun I tried to execute

  
https://bintray.com/marnen/lilypond-darwin-64/lilypond-2.19.83/2.19.83.build20200207173449

on my old MacOS Lion box, with the following error.

  Traceback (most recent call last):
    File ".../LilyPond 2.app/Contents/Resources/__boot__.py", line 98, in 
<module>
      _run()
    File ".../LilyPond 2.app/Contents/Resources/__boot__.py", line 82, in _run
      exec(compile(source, path, 'exec'), globals(), globals())
    File ".../LilyPond 2.app/Contents/Resources/LilyPond.py", line 3, in 
<module>
      from PyObjCTools import AppHelper
    File "PyObjCTools/AppHelper.pyc", line 14, in <module>
    File "AppKit/__init__.pyc", line 8, in <module>
    File "objc/__init__.pyc", line 18, in <module>
    File "objc/__init__.pyc", line 15, in _update
    File "objc/_objc.pyc", line 14, in <module>
    File "objc/_objc.pyc", line 10, in __load
  ImportError: dlopen(.../LilyPond 
2.app/Contents/Resources/lib/python2.7/lib-dynload/ob
jc/_objc.so, 2): Symbol not found: _OBJC_CLASS_$_NSObject
    Referenced from: .../LilyPond 
2.app/Contents/Resources/lib/python2.7/lib-dynload/obj
c/_objc.so
    Expected in: /usr/lib/libobjc.A.dylib
   in .../LilyPond 
2.app/Contents/Resources/lib/python2.7/lib-dynload/objc/_objc.so
  LilyPond Error

Not sure whether this platform is supported at all...  If not it would
be nice if a sensible error message could be emitted instead of this
error.


    Werner