Apple macOS Catalina

MacOS Catalina, now in public beta, will be a major update, making it easy for iOS developers to port their apps to the Mac, and for iPad owners to use their tablets as a second screen. It won't support 32-bit apps, though. Catalina from the air: the default desktop image in the next macOS version. You can choose a morning or evening image, or let the OS change the image for different times of day. As always, the General tab lets you choose between Light and Dark mode, or choose the new Auto option for switching between modes at different times. Catalina at night is in the background.