Get .app from iPad to Mac
You can't just run an iOS app on macOS; they're different operating systems. You can use the iOS Simulator bundled with Xcode, but even then you can't use the same .app file, because the CPU architecture of the iPad and your Mac are different. If it's your own app, it's easiest just to build &amp; run from Xcode; you can 'install' .app files from another source by copying them to the right folder in Finder. They will of course only run if they specifically built for the Simulator.