MacOS, with its need for a pointing device and its exposed filesystem? I call bullshit.

Either it’ll run macOS as it currently is and be a usability catastrophe, they’ll nerf macOS to the point where desktop power users stop being able to do with it what they need, or they’ll make a new “macOS” for phones, which is essentially what iOS is. (And yes, they could unlock iOS further by letting users browse their filesystems or sideload apps or whatever, but if it runs primarily on a phone-like device, it’d still make more sense to call it iOS than macOS.)