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Re:Mac OS High Sierra automatically checks EFI firmware each... by JumpCrisscross on Sunday September 24, 2017 @11:29PM (#15327869)
How do I check this? (I’ll go ahead and discard my HN dumbass card with this move.)
Re:Mac OS High Sierra automatically checks EFI firmware each... by grzm on Sunday September 24, 2017 @11:38PM (#15327897)

    > sw_vers -productVersion
    10.10.5
    > uptime
    22:37  up 58 days, 14:45, 7 users, load averages: 2.65 2.87 2.36
Re:Mac OS High Sierra automatically checks EFI firmware each... by miles on Sunday September 24, 2017 @11:38PM (#15327896)
Open Terminal.app from Spotlight or Applications/Utilities, then type "uptime" (without quotes) and press Return.
Re:Mac OS High Sierra automatically checks EFI firmware each... by masklinn on Monday September 25, 2017 @04:08AM (#15328745)
> then type "uptime" (without quotes) and press Return

Then again with quotes also works, as long as you balance them.

Re:Mac OS High Sierra automatically checks EFI firmware each... by wingerlang on Monday September 25, 2017 @07:31AM (#15329547)
You can also open the menu from the apple icon > about this mac > system report > Software > "time since boot: x days"
Re:Mac OS High Sierra automatically checks EFI firmware each... by holyjaw on Sunday September 24, 2017 @11:40PM (#15327906)
`uptime`