Compressed executables are killed by macOS zsh

[ttc0419]

What's the problem (or question)?

Compressed executables are killed by macOS zsh.

What should have happened?

Executables should work as intended

Do you have an idea for a solution?

Nope

How can we reproduce the issue?

1. Create a basic hello world C program

#include <stdio.h>

int main(void)
{
    puts("Hello world!");
    return 0;
}

2. clang hello.c
3. upx a.out
4. Run the executable

[u@mbp d](master)% ./a.out 
zsh: killed     ./a.out

Please tell us details about your environment.

• UPX version used (upx --version):

upx 4.1.0
UCL data compression library 1.03
zlib data compression library 1.2.13.1-motley
LZMA SDK version 4.43
doctest C++ testing framework version 2.4.11
Copyright (C) 1996-2023 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996-2023 Laszlo Molnar
Copyright (C) 2000-2023 John F. Reiser
Copyright (C) 2002-2023 Jens Medoch
Copyright (C) 1995-2023 Jean-loup Gailly and Mark Adler
Copyright (C) 1999-2006 Igor Pavlov
Copyright (C) 2016-2023 Viktor Kirilov
UPX comes with ABSOLUTELY NO WARRANTY; for details type 'upx -L'.

• Host and Target CPU architecture and Operating System version:

Darwin 23.3.0 Darwin Kernel Version 23.3.0: Wed Dec 20 21:30:30 PST 2023; root:xnu-10002.81.5~7/RELEASE_ARM64_T8122 arm64

[markus-oberhumer]

Unfortunately UPX compressed binaries currently do not work on macOS 13 or later, thanks to undocumented changes by Apple.

Closing as duplicate of #612