If you are attempting to open apps downloaded from the web or elsewhere on modern versions of macOS like Big Sur, you may see an error message that says something like ‘”AppName.app” can’t be opened because it was not downloaded from the App Store.’

Below that warning also states “Your security preferences allow installation of only apps from the App Store.” and the error message dialog box also shows when and where the file was downloaded from, with two options, choosing OK or to Show in Finder. But what if you want to open the app? That’s what…