run the command "chmod +x ObjectShowdownDemo" (with extension) and follow these steps in the link below

https://docs.godotengine.org/en/stable/tutorials/export/running_on_macos.html#app-is-signed-including-ad-hoc-signatures-but-not-notarized

THE MAC VERSION OF THIS PROGRAM IS UNTESTED! it may not work.

Use a VM to run the Linux or Windows versions of this Mac version doesn't work.