Jailbreak developers have found a way to run macOS on the iPhone 14 Pro Max. But it works as a virtual machine, not a full swap of iOS. The trick piggybacks on an existing iPad project that was never built with phones in mind.
The update comes from Virtual Mac, an open-source tool that lets some iPads run full macOS. Version 1.2.1 of the project extends the package to the iPhone 14 Pro and iPhone 14 Pro Max. And, as expected, support is thin, and the trade-offs are real.