I have a Mac in a remote location that operates as a server.

It's configured (from Energy Management) to automatically power up in case of blackout as the power comes back.

How can I tell if a power outage has happened (and the mac self-restarted later) and when ?

I guess I can inspect the console, but what should I search for?

1 Answer 1


If you can get to Terminal on your remote machine, just type uptime
This won't, of course, tell you why it was last restarted, but when.

  • Yes, this is one solution. But uptime is reset also if I (or someone else managing the server) gracefully restart the machine. If that was, let's say, 30 days ago it's hard to remember...
    – Paolo
    Commented Mar 9, 2015 at 8:08

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