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I've been having Safari issues since I updated to Sierra. Every once in awhile Safari will peg my CPU at ~250% and brings my computer to a standstill. I took

I've been having Safari issues since I updated to Sierra. Every once in awhile Safari will peg my CPU at ~250% and brings my computer to a standstill. I took a screenshot of the activity monitor while this was going on[0]. Note that this wasn't the "Safari Web Content" process, which I typically see where there is a rogue tab doing something crazy. This was simply the Safari process itself. The only extension I have installed is 1Password which I've temporarily disabled to ensure it wasn't causing the issue. It isn't. [0] https://imgur.com/a/YDv7c https://imgur.com/a/YDv7c

JBiserkov 10y ago
I'm not familiar with the activity monitor, what does 247.9% even mean?! Two cores at 100% and one at 47.9%?
- drakenot 10y ago
  Yes, I believe so. It was pegging multiple cores.
- lttlrck 10y ago
  Yes - though it's a little more abstract. Those 57 threads could be occupying the available cores in any number of ways to get to 247.9%
- stouset 10y ago
  This is how CPU usage has been calculated across Windows, macOS, Linux, and the BSDs practically as long as multiple cores have been a thing.
  - Tempest1981 10y ago
    Windows? Last I checked, the max is 100%. Pegging 1 core of a Core i7 shows 25%. Probably a more consumer-friendly way to measure. But 400% sounds cooler.
taylodl 10y ago
I haven't upgrade to Sierra but have started having Safari issues after the last El Capitan update. Same you're having - peg out the CPU and bring the computer to a standstill. Once I even had to power off the machine to get things back under control. I've never had to do this before in my 11 years of running MacBooks. I'm getting really concerned with Apple's overall quality. Their competitive advantage has always been they control the entire computing experience from the software to the hardware and they're starting to blow it. I hope they make adjustments before this gets out of hand.

JBiserkov 10y ago

I'm not familiar with the activity monitor, what does 247.9% even mean?! Two cores at 100% and one at 47.9%?

drakenot 10y ago
Yes, I believe so. It was pegging multiple cores.
lttlrck 10y ago
Yes - though it's a little more abstract. Those 57 threads could be occupying the available cores in any number of ways to get to 247.9%
stouset 10y ago
This is how CPU usage has been calculated across Windows, macOS, Linux, and the BSDs practically as long as multiple cores have been a thing.
- Tempest1981 10y ago
  Windows? Last I checked, the max is 100%. Pegging 1 core of a Core i7 shows 25%. Probably a more consumer-friendly way to measure. But 400% sounds cooler.

taylodl 10y ago

I haven't upgrade to Sierra but have started having Safari issues after the last El Capitan update. Same you're having - peg out the CPU and bring the computer to a standstill. Once I even had to power off the machine to get things back under control. I've never had to do this before in my 11 years of running MacBooks. I'm getting really concerned with Apple's overall quality. Their competitive advantage has always been they control the entire computing experience from the software to the hardware and they're starting to blow it. I hope they make adjustments before this gets out of hand.