Hello there! My name is Mohamed, and I'm excited to learn more about your project and help you with your system admin needs. As a systems administrator with extensive experience in MacOS optimization, cleanup, software update and installation, hardware troubleshooting, I am exactly the person you're looking for to help you with this project.
I understand that you're in need of a system admin to perform various tasks to optimize and clean up your MacOS device. The ideal candidate should have experience with disk cleanup and optimization, software update and installation, and hardware troubleshooting. In addition to these tasks, You require assistance changing login name (without breaking your current apps or configurations), fixing keychain, setting up a Plex server, etc.
I'm confident that with my expertise in system administration and related applications such as third-party applications, I can provide exactly what you're looking for. Additionally, I have the necessary skills and experience to help you with any tasks required during the cleanup & optimization process. Please don't hesitate to reach out if you'd like me to provide more details about my services or how they could benefit you in the future.
Thank you for considering me for this project!