UILaunchToFullScreenByDefaultOnMac
A Boolean value that indicates whether to launch your iPad app in full-screen mode when running on a Mac.
Discussion
To launch your iPad app in full-screen mode when running in macOS, add this key to your app’s Info.plist file and set its value to true. State restoration can override this behavior if the person using your app exits full-screen mode before quitting the app.
You can also provide a pixel-perfect, edge-to-edge, full-screen experience by including the UISupportsTrueScreenSizeOnMac key with a value of true in your app’s Info.plist file.
UILaunchToFullScreenByDefaultOnMac has no effect on your iPad app when:
The app supports iPad multitasking and resizable windows. For more information, see UIRequiresFullScreen.
The app is running on other Apple platforms.
The app is built with Mac Catalyst.