The achievement is massive -
but if I understand what’s going on the title is misleading; I think it is more like running a patched macOS userland via chroot. From an outside point of view, the author is cryptic about context, but the technical details are even more fascinating. Some technical details in this thread:
https://www.reddit.com/r/jailbreak/comments/1mn7mk1/comment/...
- Based on a POC done by Zhuowei Zhang few years ago, I think that is happening is that the author is using a filesystem from an existing macOS to run WindowServer and and enough of the supporting daemons.
https://worthdoingbadly.com/macappsios/
- Moreover, TFA’s solution requires a host iPhone Simulator to all Metal acceleration via XPC, using the same shim that provides Metal debugging.
To be clear, though, “iOS kernel provides enough facilities to run entire macOS userland” is an incredible discovery and achievement. It demonstrates that it is an order of magnitude easier to give iOS a genuine desktop environment than we would assume.
