Hey! I'm not sure why it's not working - I tried to search for a solution but, given that I don't have a Mac to test, it gets difficult to understand what's going on. I'm sorry :/
Well, that sucks. I wonder if you can get someone to help? I know a lot of programmers who’d probably be happy to help you figure it out at the Games for Blind Gamers jam discord server. Or I guess probably even anywhere where people make Unity games, they don’t even have to be blind-accessible.