Closing Mac application (clicking red cross on top) and reopening by clicking dock icon

Question

When I close my Mac application (by clicking red cross button on window top bar) the app icon stays in the dock at the bottom. Now this is normal behaviour. When user click

Answer 1

I think that the answers above aren't fully correct, to achieve this you should override applicationShouldHandleReopen(_:hasVisibleWindows:) https://developer.apple.com/reference/appkit/nsapplicationdelegate/1428638-applicationshouldhandlereopen