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482 votes
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mds and mds_stores constantly consuming cpu

As you know, the mds and mds_stores are Spotlight activities. The reason why your Spotlight is so active could be a number of things; it could be you have an app or multiple apps constantly changing ...
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116 votes

What is "photoanalysisd" and why is it using 77% of my CPU?

Update for 2019, 16" MacBook Pro running Catalina 10.15.2: start Photos, let it continue past the first dialogue box; now Preferences… in the main app menu under Photos just right after Apple ...
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99 votes

mds and mds_stores constantly consuming cpu

It's best to find high-volume directories and omit them from indexing using Spotlight->Privacy settings. In terminal call fs_usage to list files being indexed by mds_stores ~ sudo fs_usage -w -f ...
91 votes
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How to monitor and control thermal CPU throttling in OS X?

To monitor throttling, you may run: pmset -g thermlog in terminal and watch output: If CPU_Speed_Limit is less than 100 at some moments, then it means CPU is throttled.
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69 votes
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What is "photoanalysisd" and why is it using 77% of my CPU?

Your iMac is currently processing the photos in your Photos library, presumably because you’ve just imported/converted an existing Photos library from an earlier version of macOS. If you suspect this ...
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61 votes
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How to make Google Chrome Helper not use as much CPU

Invoke ⋮ Chrome Menu → Window → Task Manager to see what exactly consumes CPU. Because the helper is a black box from the OS' side of view. I personally found a mining extension that way. Also watch ...
54 votes

Suddenly the "diagnosticd" daemon rise up to over 200% CPU usage

As a software developer: Quitting the iOS Simulator resolved the issue.
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52 votes
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Which Intel "generation" is my Mac's CPU?

You can get the processor generation by running the following command in Terminal: sysctl machdep.cpu.brand_string If the output contains a dash and a number after your "iX"-Core model, the first ...
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46 votes

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

The Terminal command sysctl might be what you're looking for, in particular sysctl -a | grep machdep.cpu: [my_mac:~] admin% sysctl -a | grep machdep.cpu machdep.cpu.max_basic: 22 machdep.cpu.max_ext: ...
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44 votes
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"powerd" process uses a lot of CPU

sudo kill -HUP $(pgrep powerd) (I don't have an answer for 'why')
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44 votes

How do I identify which CPU a MacBook uses?

First off, you are not going to get the processor microarchitecture name (Broadwell, Sandy Lake, Ivy Bridge, etc.) because it's not a prominent branding scheme for the Intel processors. Contrast that ...
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41 votes

Why is the accountsd process eating so much CPU?

In Mail.app's application's preferences, I deselected "Accounts > Advanced > Automatically Detect and Maintain Account Settings" on two Google accounts, and CPU usage returned to normal.
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40 votes

The process com.cisco.anyconnect.macos.acsockext hogs Mac CPU but cannot be killed or stopped from launching

I think I’ve found a fix. Go into the Applications folder and open the Cisco folder. Delete the Cisco Socket Filter application but NOT the Anyconnect client. I’ve not had the issue since and the ...
39 votes
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Suddenly the "diagnosticd" daemon rise up to over 200% CPU usage

I had the same issue and realized that some process (in my case osascript) was flooding the system log with error messages (AEGetDescData of non-desc type 'reco' not a good idea). This apparently led ...
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37 votes

macOS - ntpd uses more than 100% of CPU

Go to System Preferences > Date and Time and uncheck Set date and time automatically. Close System Preferences, then reopen and re-check Set date and time automatically
35 votes
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Why is kernel_task using so much CPU?

You have classic symptoms that thermal issues are causing kernel task to preemptively use up CPU to prevent overheating. If you haven't reset the SMC, try that one time. If the System Management ...
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34 votes
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The process com.cisco.anyconnect.macos.acsockext hogs Mac CPU but cannot be killed or stopped from launching

Press Don't allow When Cisco asks Cisco AnyConnect Socket Filter” Would Like to Filter Network Content. If you do so it creates Network Settings that automatically launches this CPU-consuming com....
30 votes

VTDecoderXPCService taking CPU

I did a spindump via the activity monitor and so i found the resposible app. In my case it was Firefox (HTML5 Vids)
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28 votes

High CPU time of Finder in El Capitan

Looking at this Apple forum thread, the first solution was this: A first guess is: bad com.apple.finder.plist file in ~/Library/Preferences/. Delete the file. Here was another that seemed to help: ...
26 votes

"powerd" process uses a lot of CPU

sudo pmset schedule cancelall fixed it for me. After updating from macOS Ventura beta 3 to beta 4, powerd was using 100% CPU even after restarting it. pmset -g log repeatedly printed 2022-07-28 23:54:...
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26 votes

How to monitor and control thermal CPU throttling in OS X?

The official Intel Power Gadget has a Mac version.
25 votes
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What replaces x86 intrinsics for C when Apple ditches Intel CPUs for their own chips?

Intel Intrinsics are really just a library that provides easier access to a number of Intel instructions sets - such as SSE (Streaming SIMD Extensions), AVX, etc. - for C programmers. The goal is to ...
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23 votes

mds and mds_stores constantly consuming cpu

If you have trouble it when mount external hard. check this article Prevent Spotlight from indexing external drive In my case, I solved it by creating .metadata_never_index file on the root path of ...
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23 votes

"powerd" process uses a lot of CPU

Have you tried to stop powerd by Activity Monitor? This solved the CPU consumption for me. But after stopping powerd I got strange effect in Activity Monitor - it was like Update Frequency was ...
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22 votes

Why is the accountsd process eating so much CPU?

This issue appeared with macOS Catalina for me, and only if I have the Mail app open without an internet connection. Going to Mail->Window->Connection Doctor->ShowDetail, it looks like there'...
21 votes
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CPU usage is too high with Yosemite and an external monitor

This is a design feature documented by Apple. The intel design is power hungry and now that we see Apple Silicon we see efficiency taking more of a design role so cooling systems don’t need to be so ...
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21 votes
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How to disable HyperThreading on Mac OS X Yosemite?

Indeed there is a solution, but you have to have Xcode installed. Search for "Instruments" with Spotlight (cmd+space), open the application and go to the preferences (cmd+,). Select the "CPUs" tab ...
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19 votes
Accepted

How to stress a MacBook Pro Retina?

Consuming All the CPU Cores The command below runs a yes instance for each CPU core and consumes a near maximum of the computer's processing capability: CPU=$(sysctl -n hw.ncpu) seq $CPU | xargs -I{}...
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18 votes

Why is the accountsd process eating so much CPU?

The fix for this on Mojave is to install the 10.14.6 Supplemental Update - build 18G6032 The fix for this on Catalina is to install the macOS Catalina 10.15.7 Update - build 19H2 After the reboot - ...
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17 votes

mds and mds_stores constantly consuming cpu

Just to add a small tip on top of @Buscar웃 's correct answer: In my case, I realized that spotlight was actually indexing Time Machine backups (which is really a stupid thing to do in the first place)....
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