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Questions tagged [cpu]

The CPU (Central Processing Unit) is the part of a computer that performs tasks instructed by the computer programs. Its role is somewhat analogous to that of the human brain; it performs simple mathematical, logical, and in/out operation of the machine.

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How come terminal processes are paused when display sleeps?

I'm running some long-running CPU intensive scripts, but I've noticed that the CPU utilisation becomes 0 when the display sleeps. I've already kept the machine awake using caffeine. Is this expected ...
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Is it possible to control the CPU core clocks on macOS?

I would like to have any direct control of CPU core clocks. Is this possible on new MacBooks and macOS ? I use Intel Power Gadget and Macs Fan Control tools for monitoring the CPU and fans speeds on ...
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Help me crash my Mac [duplicate]

My MacBook Pro has been crashing for months, at least once a day most days. I blame it on overheating seeing as it reached 100°C on several occasions when it shut down. Last time I took it to a ...
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Suddenly the “diagnosticd” daemon rise up to over 200% CPU usage

Suddenly the diagnosticd daemon rise up to over 200% CPU usage, even with Xcode is not running, on OS X Mojave 10.14.1 I can't figure out it. The fans become very noisy.
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The graphic setting say cpu is i5 but command line is i3 [duplicate]

I check the cpu info Model Name: MacBook Pro Model Identifier: MacBookPro11,1 Processor Name: Intel Core i5 Processor Speed: 2.4 GHz It's Intel Core i5, but when check it from command ...
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System spiking CPU usage (causing 6000+ rpm on fans)

Im running a mid-2012 macbook pro on 10.9.5. I've been having massive lag spikes over the last few weeks which have gotten more consistent and prevalent the last day. I have been wearing this macbook ...
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Where does iostat get its information on mac?

Goal: update terminal command prompt with CPU usage statistics since last prompt appeared, e.g., jeremy@Mac:57%CPU|~/ $ Research: I know on Linux, iostat reads /proc/stat and looks for changes ...
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CPU cores have a temperature near 80 °C and then the fan starts to work. Can it be dangerous? (not for Core) [duplicate]

I have the same question, but about Core. This one I want to ask whether such a temperature is dangerous for other Components, then Core? I have read some advices to adjust Fan Speed, cause if you ...
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Messages and soagent making CPU spike - any solutions?

I've had my MacBook for 3 years and have never had this issue... Recently (maybe a month ago?) Messages and soagent are making my CPU spike. It sounds like my MacBook is about to take off into outer ...
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87 views

chmod using 100% CPU resources

Since upgrading to High Sierra (now at 10.13.6) on my Mac Pro 2012, I experience regular episodes where the process chmod eats up ~100% on all 12 cores. It happens about 15 seconds after logging in ...
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219 views

finder won't launch after Mojave upgrade ( high system cpu )

it appears my finder will not launch after I upgraded to Mojave. It is always unresponsive. My system cpu load is constantly around 75% also. I am unable to relaunch it even if I do a force quit ...
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Problem with kernel_task

It's about 3 days that I can't do anything with my macbook air because the kernel_task is eating up the CPU. So I found this but the command csrutil disable/enable doesn't work on the terminal (El ...
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Kernel CPU usage shows more than 100%, temperature low, fan speed high [duplicate]

The activity monitor is showing strange things, like kernel CPU % usage being way above 100%, between 200% - 1.000%. At the same time the cooling fan is running at max speed and the CPU temperature ...
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3k views

How to disable or remove the YaraScanService (MRT.app)?

Recently on MacOS 10.13.6 I have noticed high CPU usage and identified the process YaraScanService as consuming close to 90% CPU. The Activity Monitor lists it under: /System/Library/CoreServices/...
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395 views

External monitor causes very high CPU usage

I have an external LG 27UD69P-W monitor connected (via HDMI) to my late 2013 MacBook Pro, which causes the CPU usage of the Mac to go extremely high (kernel_task > 400%, sometimes much higher even), ...
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MacOS and Binary/CPU [closed]

This question applies to all operating systems and hardware, but I was curious what is going on behind the scenes when you install an OS on hardware. I know that macOS comes preinstalled on Macbooks, ...
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loginwindow high CPU usage

I have simple zsh script which executes the following code at a regular interval. spotify_track=`osascript -e 'tell application "Spotify" to name of current track as string'`; This is causes ...
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CPU speed of the Macbook Pro Retina downclocked

I've a MacBook Pro 15" late 2013. For a long time I have encoded videos with handbrake and the CPU was very hot for hours. The clock speed was about 2.8GHz (I have the 2.3GHz model) and the ...
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Expected CPU usage for Mac sound cards

My Duet sound card driver (duetUSBDaemon) constantly pulls 5-10% CPU, making it the number one consuming process on my machine. CPU: 1,7 GHz Intel Core i7. sysctl -n hw.ncpu says 4. $ while true; do ...
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How to know what is causing high CPU?

Here is the problem. Pages is causing me a High CPU but one of two things may be causing it: Pages is using memory, computing something or moving/searching stuff on memory. Pages is using the disk. ...
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178 views

Macbook performance issues with browsers

I have a MacBook Pro from 2013, and I'm having issues in both Chrome and Firefox - both are slowing down to a crawl, and when I check Activity Monitor I have multiple processes (in all the 'tabs' at ...
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423 views

xClient process consuming CPU — what is it?

Basic question, I can't find anything on Google about it. There's a process that keeps my fans spinning, and consumes about 80% cpu. xClient -- what is it, or how can I find out more about it?
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Macbook air when watching youtube at 1080p60f fan goes full speed google chrome using 180% of cpu

I have a Macbook air 13inch mid 2011 running macOS High sierra. when I am watching youtube at 1080p 60 fps my Macbook air fan runs at nearly full speed. As you can google chrome is sucking 120% of my ...
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Is there a way to see current CPU frequency in macOS from terminal (not Intel power gadget)

I am aware of these answers: https://stackoverflow.com/questions/9948987/detect-current-cpu-clock-speed-programmatically-on-os-x View the current clock Speed of a CPU in OS X? Which refer to Intel ...
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Why is Adobe Acrobat using only one core for a heavy task, and how can I make it perform faster?

Adobe Acrobat is performing Optical Character Recognition on a document with thousands of pages. This is a heavy task which will take hours. Activity Monitor tells me that Acrobat is only using one ...
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1answer
164 views

Mac Mini powerful enough to play any 1080p movie? [closed]

I have a Mac Mini (Mid 2011) with 2,3 GHz Intel Core i5 8 GB RAM with SSD, that I use to watch videos. The machine is great in all respects, except if I play 1080p encoded with H265 or VP9, the fan ...
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What could cause a huge spike in Unix System Calls for a process and how to debug

Computer Stats Mac mini (Late 2014) 2.8 GHz i5 8 GB RAM 10.13.5 High Sierra (upgraded from Sierra this week while debugging this issue) Background I recently noticed that a certain tab in Chrome ...
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kernal_task is taking all processing & slowing down Macbook Pro mid 2015 [duplicate]

I know this question has been asked and answered before but none of the solutions worked for me thats why I'm asking a new question. I have MacBook Pro Mid 2015 From few days I've encountered a ...
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1answer
127 views

Mid 2010 MacBook Pro kernel_task extremely high CPU usage (150%+) lags and kernel panics

I recently acquired a 2010 13" MacBook Pro. When attempting to boot to a Leopard installer on a USB drive, I am greeted with a kernel panic. There is no specific error message but instead prompts me ...
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37 views

CPU frequency drops to 1.0ghz when its temperature is just fine(74 degrees Celsius)

When I use Compressor to forge a video, the frequency of CPU drops to 1.0ghz. It doesn't make sense. Macbook pro 13, 2017, without Touch Bar
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UserEventAgent sucks CPU

This question is related to: What causes the UserEventAgent to run with 100% CPU usage? I am running on a MBP late 2012 on High Sierra. I observed this problem after the update from Sierra. I have ...
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MacBook Pro high CPU with external monitors

I recently ordered two 4K monitors (LG 27UD88). I connected them using Mini DisplayPort to DisplayPort Adapter cable to my MacBook Pro. When I have the monitors connected, the CPU load is very high ...
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1answer
994 views

Are these normal temperatures?

I just got a new MacBook Pro 2017 128GB no-touchbar, bought it in the refurb. I'm doing a bit of Photoshop ( I know it's not the best MBP, but I really need it right now for work ) and I have Safari (...
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1answer
3k views

sharedfilelistd and distnoted hog CPU

I understand from my findings on the topic that sharedfilelistd is an "agent that is used by applications to read/modify recent documents/servers/hosts" and distnoted a "distributed notification ...
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Missed keyboard inputs in Slack and Bear but not in other apps

My late-2013 13" MacBook Pro recently started missing some keyboard inputs in some applications, particularly Slack and Bear, and especially (but not only) when I'm in a Google Hangout video call. ...
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Crashpad_Handler using +100% CPU

First of all but not my main question how can something use the CPU for more than 100%? My main question is how can I get rid of it? Is it safe to force it to stop? I think it's a Google Chrome ...
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high cpu utilisation by /usr/libexec/sharingd

Recently I upgraded my High Sierra machine to version 10.13.4 but ever since the CPU load has been high. On running htop it showed /usr/libexec/sharingd to be consuming most of the CPU. Is there a way ...
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MacBook Pro 15" 2015 CPU throttles down to 0.8 GHz

My MPB has had this problem for years every time the ambient temperature gets a bit warmer. It starts in the spring and gets ridiculous during the summer. The MBP clocks down its processor to 0.8 GHz,...
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797 views

High CPU and GPU temperature, high fan speed, low activity

Macbook Pro early 2011 model - 13" - running El Capitan. I've been seeing other people reporting this left and right and mostly they don't look at the activity monitor first. I can say I have and my ...
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1answer
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What is portProxy.bin and why is it sucking/eating/using up my CPU?

Through today, portProxy.bin has been eating up my CPU, constantly using about 60% and making the fans in my computer whizz up. I'm guessing it might be connected to my VPN use, but now I haven't ...
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1answer
3k views

Macbook Pro screen display problems

I am using a Macbook Pro (the 2015 model A 1398). Just overnight my screen shows strange horizontal lines as this: These horizontal lines are roughly gathered in the same place on the screen (on ...
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1answer
25 views

Extracting CPUs from multiple MacBook Pro's

I have a couple old MacBook Pro's laying around and would like to put them to use. So here's the question. Would it be possible to extract the CPUs from the boards, and connect them to a single logic ...
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2answers
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How to enable process accounting on macOS

My Macbook Pro occasionally will use up high CPU and freeze after being left idle overnight. How can I enable process accounting so that I can track down the processes that consume most of the CPU?
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475 views

How to read CPU usage in Instruments.app

My iPhone is behaving slowly, so I am trying to watch CPU usage in Instruments.app on a Mac to see if any particular process is to blame. But the CPU activity in the "Activity Monitor" instrument ...
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systemd is using >150% CPU

I'm not sure what's causing it, but suddenly the systemd process just started using about 150% CPU (according to my iStat menu). I checked in Activity Monitor and it said the same. I checked the CPU ...
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2answers
156 views

Why aren't my cores more busy?

just purchased a 2010 Mac Pro, running High Sierra. It has 12 lovely cores. But, when I look at the CPU activity in the CPU History half of the rows are blank (image below). Does this suggest one ...
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1answer
257 views

MacBook Pro integrated GPU drawing too much power when CPU monitoring app is running

Main problem: When I run an app that monitors CPU temperature, it rises from 40° to 76° in 3 minutes. Even though the CPU usage is 12%, CPU package power draw maxes out at 31W. I checked the clock ...
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2answers
5k views

MacBook Pro Late 2011 worth upgrading? [closed]

I recently bought an MacBook Pro Late 2011 with an i7 2.2 GHz and 4 GB of RAM. I wanted to get started in some mobile development and learn how to work with macOS. So this was a good offer online. ...
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2answers
538 views

Mac is using 100% CPU while it is OFF

I have a MacBook Pro (Retina, 13-inch, Early 2015) MacOS High Sierra 10.13.2 Sometimes my mac using a lot of CPU power. The usage is 75% of the system. But this occurred when I was away and the mac ...
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How to check if my iPhone was slowed down by Apple software update? [duplicate]

My iPhone SE suddenly started to be slower. I have also tried to reset to factory settings. I am wondering if I may be effected by Apple's decision to slow down devices with older batteries. How ...