Modern iPad apps are, in theory, already designed to take advantage of landscape mode, and (if they support Split View) they're already capable of dynamically adjusting how content is presented as you resize windows. If you’ve ever tried using most Android apps on a Chromebook (or a tablet, though Android tablets have been effectively dead for a while now), you know why you don't want to run an app designed for a narrow, primarily vertical phone screen on a wide, primarily horizontal laptop screen. Note that Apple is specifically bringing iPad apps to the Mac, not iOS apps. Apps can also take advantage of things like the menu bar and additional windows, things that are available on a Mac but not on iPads. Using Catalyst, an app that already knows how to handle taps and swipes from a finger can in many circumstances automatically be adapted to handle clicking and scrolling from a trackpad. To recap, Catalyst works by mapping certain behaviors from UIKit, which is used to build iOS and iPadOS apps, to AppKit, which is used to build Mac apps. And for the first time, Screen Time comes to Mac, giving users insight into how they spend time in apps and on websites, and the ability to decide how to spend their time.Further Reading Catalyst deep dive: The future of Mac software according to Apple and devs With Mac Catalyst, a new technology in Catalina that makes it easy for third-party developers to bring iPad apps to Mac, users will begin to see their favorite iPad apps in Mac versions, including Twitter, TripIt, Post-It, GoodNotes and Jira, with more to come. Voice Control, a transformative accessibility feature, allows Mac to be controlled entirely by voice.
A new feature called Sidecar extends Mac desktops with iPad as a second display, or tablet input device using Apple Pencil with Mac apps. Adding to great entertainment on the Mac, Catalina also features all-new Mac versions of Apple Music, Apple Podcasts and Apple TV apps.
With macOS Catalina, users are able to enjoy Apple Arcade, a groundbreaking new game subscription service featuring new, exclusive games from some of the world’s most creative developers. MacOS Catalina, the latest version of the world’s most advanced desktop operating system, is now available as a free software update.
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