This is the coolest, awesome most useless thing I’ve read in awhile. I can’t wait to see where this goes.
Far from being useless, this sort of work could ultimately make it easier to preserve existing Classic Mac OS-based apps and code, and run them on modern systems. Just as having FreeDOS around and even in active development makes it easier to support the DosBox platform.
Uh, how does making Swift compile new code to Mac OS 9 help with preserving old code?
It ensures that toolchains for the system continue to work on modern computers.
Why? You can already run the original toolchains used to write classic software using emulators.
In addition, there is a modern GCC-based toolchain for classic MacOS: