Worked on the tw93/Mole repository to enhance macOS update availability checks, focusing on improving detection accuracy and performance. Applied Bash and shell scripting to tune timeout and command options, reducing false positives and ensuring more reliable update visibility for end users. Expanded test coverage by validating edge cases, handling timeouts, and managing empty outputs, which strengthened the robustness of automated update validation. Addressed a key bug related to macOS update detection timeouts, increasing reliability across different environments. Demonstrated disciplined release engineering and system maintenance practices, delivering measurable improvements in reliability and confidence for automated system update checks.