Worked on the openjdk/jfx repository to address a cross-platform UI integration issue affecting JavaFX applications on macOS. Focused on improving the reliability of the native application menu when JavaFX apps are launched after a Swing-first startup, the developer delivered a targeted bug fix that ensures proper system menu functionality. This solution involved close collaboration with team members through code reviews and co-authorship, emphasizing maintainability and low-risk changes. Utilizing Java, Objective-C, and expertise in JavaFX and Swing, the work reduced user-facing inconsistencies and contributed to a smoother experience for both developers and end users on macOS platforms.