Thanks for the pretty detailed response. I'll definitely look into all of this and see if I can get it running on my hardware (which is a puny little 2012 Macbook Air...).
I know for certain that my initial issue was that the Mac executable wasn't signed in anyway giving me the "App is damaged and can't be opened" error. So at the veeeery least I'll get it signed. I hope running an outdated (Catalina) of macOS doesn't give me issues with running on newer versions.
To be honest I have the money for a 13" M2 Macbook Air... but I'm saving it for a car (real important in rural USA) AND it would leave me almost broke. But I definitely want to support Macs at... some point.