Isaiah focused on stabilizing the macOS test suite for the TileDB-Inc/TileDB repository, addressing compatibility issues introduced by Apple Clang 16 and newer. He resolved a build failure affecting the tests target on macOS 15 by disambiguating the use of stop_token and std::jthread, and by applying the -fexperimental-library compiler flag for Apple Clang 16 or higher. Working primarily with C++ and CMake, Isaiah’s targeted bug fix improved continuous integration reliability and reduced flaky test runs on macOS environments. His work demonstrated a deep understanding of build systems and platform-specific development, resulting in more robust and maintainable test infrastructure.