

And now, you can use new APIs to allow window resizing and repositioning, set the style of window control buttons, show popovers for toolbar items, and implement new alert styles. App lifecycle APIs make your app simple to manage when it’s running in the background. iOS Photos editing extensions can be built to run on Mac. Apps can be fully controlled using just the keyboard, and you can also create out-of-window and detachable popovers, control window tabbing using new window APIs, and make it easy for users to select photos in your app by using the Photos picker. You can create even more powerful Mac apps using the APIs and behaviors in macOS.
