Ok, so I’ve found a github repository that builds a macos package from a twine game. Great! https://github.com/lazerwalker/twine-app-builder

But then Steam asks what OS is supported by this, and what Processor it needs. I do not own a macos, so I cannot test this. How do I check this from the package itself, without running it on a macos? Or do I need a tester? Here is a link to an example application: https://github.com/lazerwalker/twine-app-builder/releases/download/135.0.0/My.Twine.game-darwin-arm64-1.0.0.zip

How do I determine what OS and Processor can run a MacOS package, after building it, without owning a MacOS? Is this even possible? What is an alternative way if it is not possible?

I have not tried anything, as I do not own a MacOS. I cannot test this…