Stop making it so complicated!
Why do you need to make it entirely different from the PC version and make it a hassle everytime you need to switch between Word on PC and Word on Mac? It's incredibly frustrating and stupid. It's not even remotely close to being the same product. Rubish.
You have to understand that they are 2 different platforms. I just want to let you know that it would take more than 10 years just to get approval from Apple for the app.
It's not Microsoft fault. It's Apple who is stubborn to force every app to have this old school top cascading menu and all options there.
MacOS interface is from previous century, but it's your choice, so deal with it or switch to a system for professionals.