When I want to create an app that continues to update the drawing even while I am minimizing the window, on Windows I was able to achieve this by overriding QWindowSystemEventHandler::sendEvent and filtering Expose events (as in the attached updateinminimum.zip).

However, this does not work on macOS. On macOS, Expose events are sent to QGuiApplication without going through QWindowSystemEventHandler::sendEvent.

I want to be able to update the drawing continuously even in minimized window on macOS, just like on Windows.