Focused on cross-platform build stability, this developer addressed critical macOS GCC compatibility issues in both the microsoft/vcpkg and uxlfoundation/oneTBB repositories. By refining conditional logic for GNU assembler version detection and adjusting compiler diagnostic pragmas, they resolved build failures that previously hindered TBB functionality on macOS with GCC. Their targeted patches improved build reliability and reduced CI noise, enabling smoother development workflows for downstream users. Working primarily with C++ and CMake, and leveraging expertise in build systems and compiler toolchains, they delivered auditable, low-risk fixes that enhanced maintainability and ensured consistent cross-platform support without introducing new features.