Hi, your game is listed as supporting macOS and linux, (im on Mac) so I downloaded it to try out. Problem is, your game only supports windows, .exe files don't run on Mac or linux. Now you know, so you can update the game listing.
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Hi, I use Unity aswell. I am aware that there is the platform, Win/Mac/Linux. However, once you are within that platform you must select which one of the three you are building for. This is done by changing the 'Target Platform' field. You may need to install an additional component via the Unity hub to create builds for macOS. I can tell you from experience that .exe does NOT run on macOS. MacOS's equivalent is the '.app' file extension. If you look in the build for your game, there is only '.exe', no '.app' files.
See here https://docs.unity3d.com/Manual/macos-building.html for building to macOS. The target platform in their build settings has been set to 'macOS'. This will produce a '.app' file.
See here https://www.lifewire.com/exe-file-2622732 for more about .exe files, take note of the supported platforms.
While there are several methods on macOS to emulate a Windows environment to run a '.exe' file, it is not natively supported, requires extra software and is a bad experience
I was not aware that Mono was able to run '.exe' files. It didn't work for me though, I just tried it. I got an error about not being able to find a valid CLI image. Its still the problem I outlined though, it isn't running natively on macOS, it requires extra hoops to jump through and extra software that isn't necessarily installed on a users machine. As such, it shouldn't be listed as supporting macOS. In the same way that you can get emulators for console games to make them run on a computer, and while they may run they are not supported.