Worked on the nim-lang/Nim repository to implement native macOS GUI app bundle support, enabling Nim to package GUI applications as standard .app bundles when using the --app:gui flag. This involved creating the correct bundle directory structure, copying the compiled executable, generating an Info.plist with appropriate settings, and removing the original executable to ensure clean distribution. The update addressed the issue of unwanted console windows appearing for GUI apps and aligned Nim’s packaging process with macOS conventions. The work drew on skills in build systems, compiler development, and macOS development, and was implemented using the Nim programming language.