.exe files are only compatible with Windows. Macs do not open and cannot read .exe files. To run anything with a .exe you need to either install Windows via bootcamp on an intel based Mac or use parallels if you have an apple silicon based Mac. To run SDT on a Mac easily, you need to either install the flash player projector (which is technically not supported) or I have found that the Elmedia video player app (available in free and purchase versions) also runs .Swf files. Install the flash player projector (FPP) (it allows you to run flash files) or that video player app, download sby's loader pack, and right click on the file called "Loader.swf" and choose "open with" and select either Flash player (should be an option once you've installed the FPP or Elmedia player. You should be able to play the game that way.