MP All Models Is the AC command always right? (Total uptime)

[Loa]

Hello,

Out of curiosity, I tried the AC command on my 2009 MacPro and get a result of 8999 hours.

That result is obviously wrong, since the computer has been running at least 12 hours a day since I bought it in 2009.

Any reason why it doesn't work? Or is the 8999 something other than "hours"?

Thanks

 

[tsialex]

ac display the hours that your current macOS install run. If you do a clean install, it's reset.

 

[Loa]

Thanks for the simple answer. I'm assuming there's no way to know the real total uptime?

 

[triptolemus]

Edit: I think you're looking for cumulative machine uptime. Not sure that exists.


uptime

macmini:~ mikey$ uptime
13:36 up 3 days, 6:03, 3 users, load averages: 10.08 10.15 8.37

 

[tsialex]

Thanks for the simple answer. I'm assuming there's no way to know the real total uptime?

Nope. Apple could have implemented it storing the hours on a private NVRAM variable, but they never got the idea.