The Quill Office add-ins are only compatible with Microsoft Windows 

in order to install the Quill add-ins on a MAC, you will need to run Windows as a virtual machine. You can do this via a 3rd party application called Parallels -https://www.parallels.com/

Once Parallels is installed, you will then need to Install Windows and a copy of (Windows)Microsoft office on the Windows 10/11 virtual Machine. Please note, only Intel processors are supported.