We're sorry to hear you're having issues with the mac version! We're looking into the problem and will let you know when we have a solution. Would you be comfortable sharing what your mac OS is?
Also: Have you tried downloading the app / launching it through Steam? In our trials we were able to launch the game through Steam on a Sonoma 14.5 OS. If Steam is an option for you, our page is here: https://store.steampowered.com/app/2070170/The_Good_People_Na_Daoine_Maithe/