It might mean that you try to install a Windows OS program on your Mac.
Please, contact us via Support Center, so we can provide you with a corresponding installation file.
Current latest versions are cross-platform, so if you purchased a licence for Windows, it will still be possible to utilise it on macOS, and the other way around.
If you have an older licence and now migrated to a different OS, you can purchase a corresponding licence with a higher discount.