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PostPosted: Sun Mar 19, 2017 12:12 pm 
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No idea what causes it, just noticed it this week a couple of times, Restart is only thing that fixes it.

It doesn't show in Terminal using top, it shows in Activity Monitor & can't be sampled, just goes on forever trying to sample.

From Etrecheck...

Top Processes by CPU: ⓘ
93% powerd
10% WindowServer
5% sysmond
2% mdworker(10)
2% kernel_task


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PostPosted: Sun Mar 19, 2017 1:13 pm 
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Can you quit it in Activity monitor, to save doing a restart?
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PostPosted: Sun Mar 19, 2017 2:12 pm 
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Sometimes that cuts CPU usage in half, only to get back higher within a minute or so, sometimes it has zero effect to Force Quit it, thanks.


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PostPosted: Sun Mar 19, 2017 2:34 pm 
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You must already have done some searching for this, but I'm getting quite a few hits, nothing leading to a satisfactory solution for everyone, however, when I search for "powerd OS X."


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PostPosted: Sun Mar 19, 2017 3:03 pm 
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Thanks, yes I have, Little Snitch has been blamed, far as I can tell that isn't the case here, many other allusions to what it is, & LOL plenty of don't worry about it, it means nothing!

Also read it mostly happens with File Sharing active, which may be, combined with something else, trying to watch that & see if I can stumble on something.


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PostPosted: Sun Mar 19, 2017 4:34 pm 
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BDA, is this in El Capitan by chance?

Edit: It is NOT advisable to force quit powerd as it does not properly reset power management when you do so. You need to reboot. Typical powerd behaviour when force quit is to ramp up to 100% CPU (single core) use for ~15-30 seconds and then return to normal levels. However power management is hosed so a reboot is still needed.

Also, QuickLook is guaranteed to trigger powerd's spazfest. It doesn't manifest immediately, but once you trigger QuickLook, powerd begins ramping up its CPU creep.

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PostPosted: Sun Mar 19, 2017 6:03 pm 
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Thanks ST, this is Yosemite/10.10.5, I never purposely use Quicklook, but may have to try to answer a couple of questions lately!?


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PostPosted: Sun Mar 19, 2017 6:19 pm 
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BDAqua wrote:
Thanks ST, this is Yosemite/10.10.5, I never purposely use Quicklook, but may have to try to answer a couple of questions lately!?


I skipped Yoshitme entirely, so it's possible powerd was borked in that OS too. Looks like you're going to need to move to Sierra to fix that. It's broken in all versions of 10.11, that much I do know.

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PostPosted: Sun Mar 19, 2017 6:27 pm 
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Or go back to 10.8.5, which I normally run, but was trying to those with 10.10... thanks. :)


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