I have never written for a Mac so have no idea where to start and don't really want to go down a long road to write one and then have two apps to maintain. I have a Windows app that I have written and it's quite complex. NET Core Framework will depend on the exact version you are using. 'Click Once' applications only support compatible versions of Windows. It is worth pointing out that at this time MS SQL Server CE can only be installed on Windows.
NET Core application that runs on Windows and macOS.
Is it possible to install and run Windows applications on iOS or macOS?