NootedRed is a macOS kernel extension (Lilu plugin) that enables AMD integrated GPUs (Raven, Picasso, Renoir, Green Sardine) on macOS by patching Apple's proprietary AMD GPU drivers. It operates through binary patching, runtime vtable manipulation, and firmware injection to spoof GPU identity, fix display/audio/backlight issues, and provide hardware acceleration. The codebase is a intricate reverse-engineering effort, with hardcoded version-specific offsets and byte patterns, but it is structured into modular components such as display controllers, hardware library patches, and a reusable patching toolkit (PenguinWizardry). While the project is highly specialized and fragile due to its reliance on exact binary layouts, it demonstrates advanced kernel programming and reverse engineering skills. The repository is actively maintained for current macOS versions and includes a CI pipeline with static analysis.