alusnickic

If you want to build a windows app on Mac or Linux OS, you need to install [wine](https://www.embird.net/sw/embird/tutorial/wine/wine.htm) and [mono](https://www.mono-project.com/docs/getting-started/install/mac/). In your case, the [mono](https://www.mono-project.com/docs/getting-started/install/mac/) is missing.