I do, I don't get why
Hey guys. Thank you for getting in touch. This is acutally well-known problem for all MacOS games made in RPG Maker engine that wasn't deployed in MacOS enviroment (I'm using Windows PC). Apparently, a game deployed in this way doesn't have all the internal premissions to be able to write a new file, thus, it doesn't allow you to create a new save.
That's why, for now, the game features a few options to resume the story from a certain points (days), to make it easier to jump in and resume your progress.
I'm also planning to soon release a web-browser version of the game (along with the new upcoming public update), so please give it a try and let me know if it solved the problem.