Hello hana, I'm sorry you're having trouble.
Unfortunately, I have the worst time troubleshooting anything mac, as I do not own one, so I can't guarantee when this will be fixed, especially because I am working on a different version of this game that will supercede the version you downloaded.
In the meantime, you could try the twine version, which is browser based and fairly reliable. (By navigating to the Asher game page and clicking the button "play visual novel")