latest MacOS breaks py2app packaging

[totaam]

I can't wait to hear the excuse wrapped in marketing speak that they will have to come up with for explaining doing dumb stuff like this:

$ from ctypes import cdll
$ lib=cdll.LoadLibrary('/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation')
$ print(lib)
<CDLL '/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation', handle fff115f189f8 at 0x1053eec80>

% ls /System/Library/Frameworks/CoreFoundation.framework/
Resources
Versions
% ls /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
ls: /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation: No such file or directory

As per MacOS Big Sur - Python ctypes find_library does not find libraries (ssl, CoreFoundation, etc: This behaviour stopped working in macOS Big Sur due to dylibs being removed from disk when they are included in the dyld shared cache

More hand waving in this thread: Missing librairies in /usr/lib on Big Sur?

So the files exist, but stat or ls can't see them!
Wow.

This causes the py2app packaging scripts to fail when they try to create_binaries: MachOGraphy.py doesn't find the file in run_file and bails out..

[totaam]

I thought that these commits would have fixed things:
ronaldoussoren/macholib@7f610ee
ronaldoussoren/macholib@7d1b50c
But these are old and already included in macholib 1.16.x

So I wrote my own ugly patch:
Xpra-org/gtk-osx-build@9752e5d