If you are running Mac OS 10.16 or later the game will not work, as support for RPG Maker MV ended with that version of the operating system. If you have an earlier OS, you might be able to fix it by moving the game into your "applications" folder. Otherwise, you can try running it through the web version. You will need to apply the following guide to set up your browser to allow the game to run through it though. https://www.reddit.com/r/RPGMaker/comments/dqvdqo/fix_error_failed_to_load_dataa...