Wow, that makes so much sense - thank you! It sounds like it essentially "vibed up" the parts it didn't understand, which is amazing.

Just as an experiment, I fed the resource fork to GPT-5.2 to see whether it could render the windows/dialogs in the resource fork - it did a fairly okay job. I think the fundamental limit it ran against (and acknowledges) is that lot of Mac's classic look and feel was defined programmatically, literally, down to calls to RoundRect(...).

https://chatgpt.com/s/t_694dddb290308191babcb07a72367e97

Thanks for posting your experience.