It’s a common workflow that I start an app and it tells me to download the new version from their website. I usually do that right away, mount the image and drag the app to /Applications only to be greeted by this message.

I know why it’s there but it would be nicer to just offer a “Close Application.app and move Application.app to target”. Just like what you get if you shut down your Mac and there’s still some process running which blocks the shutdown.

I guess that’s not a priority in the days of the App Store.