In February 2025, Halechan focused on stabilizing the Metal backend for Intel Macs across the ggml-org/llama.cpp and Mintplex-Labs/whisper.cpp repositories. By leveraging C/C++ and Objective-C, Halechan implemented conditional compilation to guard residency-set initialization, ensuring this feature only activates on macOS 15.0+ and non-x86_64 architectures. This approach prevented runtime crashes specific to Intel Macs, improving reliability and reducing support overhead. The work emphasized cross-repository consistency, with identical mitigation patterns and well-documented commits for traceability. Halechan’s targeted bug fixes addressed platform-specific instability, demonstrating a deep understanding of macOS development and the nuances of Metal API integration.