Once your create a new monogame project using:
dotnet new mgdesktopgl -o MyGame
When you build it, an error occurs:
CSC : error CS7065: Error building Win32 resources...
While this is not fixed, an easy workaround is to replace your “Icon.bpm” and “Icon.ico” from your game folder with those available here: https://github.com/MonoGame/MonoGame/tree/develop/Templates/MonoGame.Templates.CSharp/content/MonoGame.Application.DesktopGL.CSharp
Build your project again and it may run now.
I’m a Mac user and the version is g(old) High Sierra btw