Each one is connected to the next and all of them complicate each other in interesting and almost mind-bending ways. There are multiple, overlapping things to discuss with Apple’s WWDC 2020 announcement for the Mac. So while it’s still true that macOS and iPadOS are not merging, there’s another metaphor that Nilay Patel has been using that feels really salient right now: they’re on a “ collision course.” Now, in 2020, Apple is taking an even bigger step: it has announced that iPhone and iPad apps will run “natively” on upcoming Macs that use Apple’s own silicon. He used that slide as the introduction to a “multi-year project” that would eventually become known as Catalyst, a way to port iPad apps to the Mac. The most famous Apple keynote slide in recent memory is one giant, single word with a period that slammed down with a little puff of dust in 2018: “No.” It was software and engineering SVP Craig Federighi’s answer to the question of whether or not the Mac and the iPad would merge.