This is the only solution I found. Hope this helps
- if the game isn't working due to a "cannot open "game"" error, it's a permissions issue -> open terminal -> navigate to the folder where the game is stored (for me it was by inputing the command cd downloads -> cd Chronicles_of_Hell_and_Heaven_MAC -> cd COHAH) -> sudo chmod -R 755 Game.app (changes the permission of the app so it can run) -> if it gives an error about untrusted developer or whatever, ctrl + click -> open -> it should let you open the game! all credits to this kind stranger who's post i found on the rpgmaker web forums. there's also a tutorial to port the game from rpgmaker mv (probably what the game is running) to the newer version of rpg maker mv (bit more optimized, and increases performance)
- here's the tutorial: https://forums.rpgmakerweb.com/index.php?threads/need-some-help-cannot-open-a-game-on-my-macbook-pro-the-game-was-made-from-the-rpg-maker-mv.150926/#post-1307030 (credits to proxxie_desu).