20 Minutes Till Dawn is a horror game developed for mobile devices. It is not clear if the game is available or compatible with Mac devices. It is possible that the game is only available for Android and iOS devices.
If you are interested in playing 20 Minutes Till Dawn on your Mac, you may want to try using an Android emulator, which allows you to run Android apps on your Mac. There are several Android emulators available, such as BlueStacks, NoxPlayer, and MEmu. These emulators can be downloaded and installed on your Mac, allowing you to run Android apps and games.
However, it is important to note that not all Android apps and games will work on an emulator, and some may have compatibility issues or other problems. It is always a good idea to do your own research and test the game or app on an emulator before making a purchase to ensure that it will work as intended.