1. open terminal on your Mac, it should pop up if you search for it in finder
2. click on where the text ends to make an edit, then hit enter to make a new command. type "chmod +x " (do not include quotation marks and make sure there's a space after x)
3. right click on the application, select show package contents.
4. go to contents ->MacOs->TheFalseSun
5. Drag TheFalseSun into terminal and hit enter. TheFalseSun icon in your package should switch from a blank white paper to a black box with the word "exec" on it. This may take a few tries.
6. close out of the package contents and double click on the game icon, it should work
hope this helps!