Hi. I personally don't own a Mac, but several people who do own a Mac contacted me explaining step by step what I needed to do to make my games work on Mac, and it is thanks to these people that I was able to draw up the installation instructions. These people guarantee me that all my games work on Mac. I don't know why you have this problem, but I think it's more related to security issues with your Mac than with my games.
Maybe you should do some research on how to tell your Mac that the “libSDL2.dylib” file is safe. For example you could see here https://discussions.apple.com/thread/250425993?sortBy=rank or here https://discussions.apple.com/thread/255118639?sortBy=rank.
If you can't solve it, I can possibly post a devlog and let Mac owners know about your problem.