The author successfully ported Mac OS X 10.0 (Cheetah) to the Nintendo Wii, a feat previously considered impossible. The process involved understanding the Wii's hardware, creating a custom bootloader, and patching the kernel to fix compatibility issues. The author also had to write drivers to support the Wii's hardware. The project was a learning experience, and the author used various tools, including non-agentic AI, to help understand the XNU codebase.