WWDC 2019: Apple Turns iPad Into a Second Mac Display With Sidecar on macOS Catalina

At its WWDC 2019 keynote, Apple announced a new extended desktop feature called Sidecar for the new macOS Catalina — named after a southern California island — allowing users to use their iPad as a second display, or as an input device in creative apps such as Adobe Illustrator. The former use case is straightforward, letting you extend or mirror your main display, as per your requirements. With the latter, you can now use the Apple Pencil to interact with Mac apps, provided your iPad supports it. Better yet, Sidecar will work wired or wireless (10-metre range), which gives you more freedom to use it how you please. At WWDC 2019, Apple also unveiled changes to iOS, tvOS, and watchOS, apart from announcing iPadOS.

Naturally, you'll be able to use all iPad gestures to interact with Mac apps, including the new ones — three-finger cut, copy, paste, and undo — announced at the developer-oriented WWDC 2019 keynote on Monday. Sidecar will also offer a sidebar on your iPad for commonly used controls, be it modifier keys for shortcuts, or buttons to hide the menu bar, dock, and keyboard. Additionally, Touch Bar controls will appear at the bottom of the iPad screen when using Sidecar, even if your Mac doesn't have a Touch Bar.