Universal Control blasts open the door between Mac and iPad for an eye-opening experience

Are macOS and iPadOS becoming one? Not exactly, but the arrival of Universal Control on iPad OS 15.4 Beta and macOS Monterey 12.3 Beta pierces the thinning barrier between the two.

The update, which may take weeks to arrive for general download, connects a Mac and iPad and creates an open road for your cursor to travel from one interface to the other without breaking a sweat.

There are some small hoops to jump through, like signing in to all the devices with the same Apple ID and verifying that you want to connect these systems, but you only do that once. After that, Universal Control gives you a double-wide desktop, albeit one with some significant limitations.

Universal Control might remind some of Apple’s Sidecar for macOS, which Apple introduced a few years ago. It’s similar but less of a two-way street than Universal Control. It extended the Mac desktop onto the iPad, which more or less put the iPadOS to sleep in the background. It was a bit more than that, though, in that you could use your finger on the iPad like a mouse and, if you had an Apple Pencil, use it to draw on some macOS apps much in the same way you would on an iPad.