Shoppa is an application built for Windows computers and does not work on MacOS.
To properly install and use Shoppa on your Mac computer you will need to run Windows 10.
We recommend that you use either Boot Camp which is a free application preinstalled on Mac computers or Parallels which is a subscription-based software that allows you to connect to a Windows 10 virtual machine.
Boot camp – What is it and how to install it?
Boot Camp Assistant is a multi-boot utility included with macOS that assists users in installing Microsoft Windows operating systems on Intel-based Mac computers.
Follow this guide by Apple on how to install Windows 10 with Boot Camp: https://support.apple.com/en-us/HT201468
What is Parallels Desktop and how to install it?
Parallels Desktop by Parallels is a software providing hardware virtualization for Mac computers with Intel processors.
Follow this guide by Parallels on how to install Windows 10 with Parallels Desktop: https://www.parallels.com/blogs/install-windows-10-parallels-desktop/
How to install Shoppa in Windows 10
To see instructions on how to install Shoppa on Windows, please read more here: https://kb.shoppa.com/knowledge-base/install-shoppa-2/