Marco Gra worked on maintaining the lizongying/homebrew-cask repository, focusing on updating OpenCore Patcher to versions 2.1.0 and 2.1.1. He updated the SHA256 checksums in the release entries to match new binaries, ensuring that Homebrew Cask installations remained verifiable and secure for macOS users. Using Ruby and leveraging his skills in Homebrew and package management, Marco prioritized release-entry integrity to support stable patching workflows. His contributions reduced installation errors and improved user trust by maintaining accurate versioning and checksum validation. The work demonstrated careful attention to release maintenance, though it was limited in scope to version bumping.