Worked on stabilizing PNG integration for the opencv/opencv repository, focusing on macOS build reliability. Addressed a persistent issue where PNG status display and configuration variables were inconsistently handled during builds with BUILD_PNG enabled. Used CMake scripting and cross-platform build system expertise to implement coordinated changes that guarded status reporting, locked include directory variables, and cleaned up build cache to prevent stale values. Verified the solution on macOS with Homebrew-provided libpng, ensuring correct discovery and usage of bundled libraries. This work improved CI reliability and reduced troubleshooting time for developers relying on consistent PNG support in OpenCV builds.