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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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cpu clock too low / force cpu clock / overclock

I have a MacBook from a few years back. When I use it write some code and browse the internet, the fans go very fast and the noise is horrible. But the temp shows only 70 C. So I used SMC to force ...
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Why is kernel_task lagging my computer, and how can I limit it? [duplicate]

Kernel_task on my computer jumps from 3-380/400 CPU usage whenever I'm playing games, and causes my computer to lag. Is there any way to safely limit it. Edit: kernel_task's CPU usage is spiking with ...
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61 views

yes takes CPU usage to 99% [duplicate]

Running yes > /dev/null takes my CPU usage to 99%. The Macbook Air 2018 have a 2 core CPU (1.6 GHz Core i5 [I5-8210Y]). Why is the "% CPU" taken by this process so high?
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MacBook Pro 15, 2015 Fans are very noisy

I bought a restored MacBook Pro 15 2015 (MacBookPro11,5). And noticed a strange behavior: 1) Fans are very noisy. For example, if i watch a video on YouTube 4k 60 fps, then the temperature of the ...
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Java is taking up 95-100% of my CPU

I have a 2018 MAcBook Pro i use to program in University. Whenever i do this, i use Eclipse IDE and it takes from 95 to 100% of my CPU, which sometimes leads to my fans to be loud although the pc isnt ...
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Can't remove the heatsinks on a MacPro 3,1 (earily 2008), even though I have the screws out?

I have a MacPro 3,1 and the screen keeps going black and the fan starts blowing at high speed. I ruled out that it was my OS by running Clonezilla and attempting to clone the harddrive, and during ...
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199 views

Mac Os tccd using cpu

My mac air started to put huge load on CPU after updating OS. This seems to happened with others when using Xcode 8 and with that its seems that disabling Contacts helps, but in my case it is not ...
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Intel® Core™ i5-7360U Processor bottleneck for an RTX 2060 GPU

I am planning to buy an RTX 2060 GPU, primarily for deep learning. I have a MacBook Pro 13-Inch (Mid-2017 Retina Display), which has a Intel® Core™ i5-7360U Processor. I read at certain places on the ...
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How to throttle CPU on a Mac? [duplicate]

How to throttle CPU on a Mac? I want to throttle CPU so that I can extend the battery life on a single charge. Device: MBP 2015. Running Majove.
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2answers
125 views

Does macOS have a command to retrieve detailed CPU information like /proc/cpuinfo on Linux? [duplicate]

Linux has a command to retrieve detailed CPU information using cat /proc/cpuinfo. Using this command, users can get CPU and CPU's core information like below. processor : 0 vendor_id : ...
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1answer
473 views

VS Code - Code Helper process using more than 100% CPU on macOS

I noticed that my MacBook gets hot and noisy (fans) when using VS Code (v1.31). The Activity Monitor shows the process Code Helper using more than 100% of CPU. It started happening with one repository ...
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How to get time-dependent CPU usage logs?

Sometimes my MacBook pro 2017 starts rotating the fan very fast. It's hard to see if there is anything abnormal in the Activity monitor because it looks pretty much as always but the total CPU load. ...
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1answer
38 views

Ring fence CPU for a specific programme / process to stop it using to much

I've just had an app run my CPU (as viewed in activity monitor) to 102% whilst it was running a compiling and installation task. My machine was basically unusable as a result. Is it possible to ...
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1answer
54 views

What is `tic` and what can I do about it using 100% CPU?

I have a process named tic that occasionally shows its ugly face in htop or Activity Monitor, consuming around 100% CPU. I couldn't find any good info on it last time I tried. What is it for, what ...
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1answer
47 views

Does charging and CPU usage affect each other?

If I use the CPU heavily while charging a Mac, how much slower will the charging be? It would be interesting to hear if someone has data how many minutes it takes to: Charge 0-100% while using ~0% ...
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1answer
38 views

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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2answers
920 views

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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2answers
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Help me crash my Mac — beyond stress tests [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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0answers
660 views

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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1answer
46 views

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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122 views

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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1answer
126 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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1answer
351 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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1answer
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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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1answer
190 views

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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2answers
7k 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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2answers
1k 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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162 views

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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1answer
198 views

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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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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2answers
786 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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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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1answer
417 views

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
261 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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0answers
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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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69 views

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
187 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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2k views

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
2k 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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2answers
7k 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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23 views

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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0answers
6k views

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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0answers
659 views

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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0answers
611 views

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,...