If the app doesn't open, right-click the app bundle - select *Open* menu item - press *Open* button. You may also need to allow running it in System Settings - Privacy & Security.
Please report about gameplay problem on forums: [Help & Bugs](https://forum.vcmi.eu/c/international-board/help-bugs) Make sure to specify what hardware and macOS version you use.
If you bought HoMM3 on [GOG](https://www.gog.com/de/game/heroes_of_might_and_magic_3_complete_edition), you can download the files directly from the browser and install them in the launcher. Select the .bin file first, then the .exe file. This may take a few seconds. Please be patient.
1. Find a way to unpack Windows Heroes III or GOG installer. For example, use `vcmibuilder` script inside app bundle or install the game with [CrossOver](https://www.codeweavers.com/crossover) or [Kegworks](https://github.com/Kegworks-App/Kegworks).