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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28 views

Mysterious process 'phonetism' eats CPU and vanishes

My 2015 MacBook running Mojave has been acting strange lately, especially whilst browsing. Sometimes Safari will freeze up, or reload a page out of the blue. I can feel my computer struggling, so I'm ...
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Websites with heavy use of websockets skyrocket CPU usage in Safari

(Problem reported to Apple Jul 5, 2019 but I got no answer as of Aug 1, 2019) If you work for Apple please review FB6505912. I have sent to you system reports and Samples from the process. I am ...
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Limit mac CPU frequency without disabling Turbo Boost?

Intel mobile CPUs now have a really low base frequency and a high Turbo Boost freq, e.g. i5 2.4~4.1 GHz. Turbo at 3.8+ makes it go all the way up to 100°C. Using 'Turbo Boost Switcher' to disable TB ...
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“Harpulia” and “Javanese” processes cause high cpu usage [duplicate]

I'm wondering what is the purpose of "Harpulia" and "Javanese" processes (see screenshot below) Hi ! They're high in CPU usage (and make my macbook pro fans to be running loud) and they do not seem ...
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How to know how much CPU and RAM I need for new computer?

I got a pimped up macbook pro (i7 3.3GHz i7) from late 2016 atm, but I feel like I could use a less powerful machine. I would like to find out what's my current/peak average CPU and RAM usage to see ...
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Does the Mac mini (2018) support Intel Hyper-Threading?

I am using a Mac mini (2018) with a 3.0GHz 6-core Intel Core i5 processor. My understanding is that this chip has 6 physical cores. The Activity Monitor shows performance graphs for 6 cores. On other ...
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CPU frequency in Intel Power Gadget

Which core's frequency and temperature are shown by the Intel Power Gadget tool? How can I observe the frequency of all the independent cores on my MacBook? Can the Intel Power Gadget be configured ...
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Activity Monitor, my system always runs in the red for CPU load - how to fix?

According to Activity Monitor my system is always running too high for CPU load. It’s always in the red in the CPU load graph and nothing I do corrects this. I’ve tried resetting NVRAM, SMC and ...
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CPU completely occupied by strange programs with person names

Anyone knows why this happens and how to resolve it? they show up out of nowhere and stay until I kill each manually. some of these names change to something new too. I thought this might be because I ...
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CPU frequency very low during high disk I/O and more aggressive fan policy

model: MacBook Pro 15-inch 2018 macOS: Mojave 10.14.5 CPU: Intel i7-8850H Recently, I've observed a significant slow-down of the macOS during high disk I/O. Sometimes the CPU frequency would be ...
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910 views

How can I tell if my Mac CPU supports AVX?

Background info for my particular case (though it would be good if answers were more general): I have an 11 inch MacBook Pro. I'm trying to run MuJoCo but it says Illegal instruction: 4. Searching ...
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Are these temperatures normal?

I have a 13-inch, Mid 2012 Macbook Pro that constantly overheats. Normally, the only app I will be using will be Google Chrome and I will still experience these temperatures. But occasionally I use ...
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How to detect if someone running mining extension through my browser?

In another question about Chrome Helper not using as much CPU user Pavel Vlasov mentioned Invoke ⋮ Chrome Menu → More Tools → Task Manager to see what exactly consumes CPU. Because the helper is a ...
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What replaces x86 intrinsics for C when Apple ditches Intel CPUs for their own chips?

There are whole industries founded on the use of Intel Intrinsics for CPU parallelisation (with SIMD). For example, the community of Lattice QCD physicists depend on that for boost in the efficiency ...
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CPU usage more than 100% [duplicate]

I am having a serious problem with my Macbook Pro Early 2011. The fans keep running and running and the CPU temperature sometimes stays constantly at 95° C. When I have a look at the activiy monitor I ...
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Why does my Macbook overheat and use so much CPU and energy when on YouTube?

For a long time now, my Macbook has been overheating and hogging my CPU. According to Activity Monitor, Google Chrome Helper is the culprit. Whenever I am browsing the web, there are usually ten ...
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How to limit kernel_tasks CPU usage?

I would like to limit kernel_task's CPU usage on my computer. I provided cooling for my MacBook Pro, cleaned out the internals, and tried resetting the SMC multiple times. I haven't tried re-...
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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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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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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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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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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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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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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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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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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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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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3k 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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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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2k 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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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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1answer
3k views

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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154 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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386 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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1answer
356 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
10k 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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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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60 views

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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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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1k 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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769 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
318 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 ...