Charles McJilton enhanced the TheJumpCloud/support repository by developing a robust macOS agent uninstallation process, focusing on thorough cleanup and improved supportability. He synchronized the macOS remove agent script with existing workflows, introduced shell and bash functions to manage user group memberships, and ensured device trust databases were properly removed. His scripting work targeted the elimination of residual artifacts, streamlining future reinstallations. In addition, Charles addressed a keychain path removal bug by refining shell script quoting, which improved reliability and reduced maintenance overhead. His contributions demonstrated depth in shell scripting, system uninstallation, and macOS administration, delivering targeted, maintainable solutions.