Can I remotely manage an old Mac running macOS Server or an Xserve?

Yes. Keep a vintage Xserve or a Mac mini still running macOS Server useful by linking it over SSH and managing it remotely from your current Mac; services, websites, certificates, security and diagnostics, all from one window, with privileged actions via a saved sudo password. It's a great way to give old Apple server hardware a second life. See fleet management and migrating off macOS Server.

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