December 2024: Delivered macOS-focused features and stability improvements across mpv, OpenCV, and Genesis, delivering tangible business value through improved reliability, performance, and maintainability on macOS. Key features delivered include mpv Window Positioning Enhancement (--force-window-position) with documentation updates and a switch to swiftc-based Swift builds for macOS to improve library creation; in addition, OpenCV Cocoa HighGUI memory management was hardened with autoreleasepool usage and a leak fix in cvGetWindowRect. Genesis Pyrender Viewer benefited from Tkinter import cleanup and a macOS-specific crash fix by stabilizing Tk root initialization at module load time. Overall impact: reduced crashes, safer memory usage, more robust macOS experiences across media playback, computer vision tooling, and AI visualization, and easier ongoing maintenance. Technologies/skills demonstrated: macOS toolchains and build optimization (meson, swiftc), Cocoa memory management patterns, Python Tkinter robustness, and cross-repo code cleanup and collaboration.