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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What causes the UserEventAgent to run with 100% CPU usage?

Since about a month, my MBPr sometimes starts up it’s fans and is getting really hot. The activity monitor tells me, that this is because of the UserEventAgent, which runs with 100% CPU usage. This ...
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0answers
7 views

External monitor CPU usage

If i close my Macbook Pro laptop whilst it's connected to an external monitor of lesser resolution, will I have more CPU processing power as it's pushing fewer pixels?
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0answers
17 views

How can I debug why fans are constantly spinning?

OK, I admit a 5.5+ yr old MacBook Air is a bit dated, but I am not overloading it. Nonetheless, the constantly spinning fans are more than a bit of an annoyance. However, I do want to understand ...
10
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1answer
3k views

Why does Apple Activity Monitor report that my Mac with a dual-core Intel i5 Ivy Bridge CPU has 4 cores?

I just got a new Apple MacBook Pro 13", mid-2012, which has a dual-core Intel i5 Ivy Bridge CPU. When I run Activity Monitor and turn on the Floating CPU Window, it shows a 4-bar graph (indicating 4 ...
6
votes
1answer
2k views

iPhone: What is `accountsd` and why is it using 80% CPU?

I just got a new iPhone 6 for my SO and noticed that it is quite toasty to handle with the battery draining quite fast. It has been 24 hours since I first set it up. I plugged it into Instruments ...
4
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2answers
20k views

Why does Google Chrome Helper spike my CPU?

This has been happening on and off since I switched to a mac at work. Google Chome Helper occasionally runs my cpu into the red and has the fan spinning madly. Sometimes restarting Chrome fixes the ...
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0answers
29 views

Why does my Mac consistently keep crashing? And why does it always have the same crash report?

Anonymous UUID: 3CA3405F-A44A-8878-F8C4-2B78641B51D2 Wed Jul 6 01:45:46 2016 *** Panic Report *** panic(cpu 3 caller 0xffffff800f79b0d4): launchd exited (signal 9, exit status 0 CS_KILLED) ...
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1answer
37 views

Number of cpus and cores in macbook pro?

On Macbook Pro, I clicked "about this mac", and it shows that Number of Processors: 1 Total Number of Cores: 2 I thought I have more cores and cpus, because when I created a virtual ...
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0answers
10 views

How can I rescale cpu frequency in El Capitan on Macbook Pro

I am running Ubuntu in Virtualbox on a Macbook Pro laptop, which has some overheating problem. How can I rescale the cpu frequency in El Capitan on Macbook Pro to a lower level, so as to reduce the ...
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1answer
561 views

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

I recently came across the Intel Extreme Tuning Utility for Windows. I tried it under Bootcamp Windows and it was very interesting to learn in what situations my MacBook Pro's (mid2012) CPU is doing ...
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0answers
15 views

Macbook Pro EFI Edit

I have Linux installed on a Macbook Pro 5.1 (2009). The Linux kernel starts up with the Performance CPU Governor, which causes the CPU to get hot. Linux will drive the CPU at 3.06 GHz, but Apple ...
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3answers
74 views

Free software that monitor CPU temperature under El Capitan? [duplicate]

Is there some free software that can show CPU temperature in real time for OS X El Capitan? Any way to have CPU temperature in the menu bar? doesn't provide such an option.
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4answers
4k views

Retina MacBook Pro running very hot?

I have a late-2013 Retina MacBook Pro, and it gets really hot really easily. I've monitored the temp with htop and iStat and they both show the same readings. It's supposed to be able to play some ...
53
votes
2answers
79k views

mds and mds_stores constantly consuming cpu

mds and mds_stores are constant CPU consumers even when I think nothing should have changed on the hard drive. activity monitor I have a circa 2009 Macbook Pro. Lots of software installed over the ...
0
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0answers
25 views

Can malware be the source or 600% load on 8-core i7 processor with nothing in Activity Monitor nor `top`?

My Mac suddenly started showing a heavy processor load, i.e. 600% or more. When I checked in iStat Menus, Activity Monitor and sudo top, no process was shown to consume more than 10%. Should I worry ...
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0answers
34 views

Why does kernel_task cpu% grow unbounded until forced reboot? [duplicate]

I saw an issue with my MacBook Pro running El Capitan with Chrome running that the kernel_task went haywire and started sucking up all the available CPU and the % cpu just kept climbing to where it ...
2
votes
3answers
4k views

Report Crash ~350% CPU Yosemite

10.10.3 There is a process, I do not know how its started and what it starts, which uses ~350% of the CPU. Its performed by 'root'. When I quit it from the activity monitor it comes back straight ...
0
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1answer
12 views

AES-IS support and processor architecture in 2010 iMacs

Which processor architecture was used in mid 2010 27'' iMacs? (iMac11,3 - EMC 2390) The CPU is an Intel quad-core Core i5 CPU, 2.8 GHz. I'm trying to find out if it supports the AES Instruction Set ...
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2answers
285 views

com.apple.bkagentservice high cpu usage

My macbook has a high cpu usage because of one process and i don't know why. This is the process all the time at 130% I think it has something to do with this log. The log is getting spammed only ...
0
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0answers
70 views

OSX10.11: Completely Disable Spotlight

Spotlight is driving me crazy. It has a constant CPU usage of 100-200% making my laptop run hot and reducing my battery life to half of what it used to be. This is my development machine and I can ...
5
votes
1answer
84 views

Is it normal for there to be a 5min+ period of high CPU usage when going to sleep under El Capitan?

I have recently upgraded my 8GB MacBook Pro (mid 2010, model ID: MacBookPro6,2) from OS X 10.6.8 to 10.11.4. Under Snow Leopard, after I closed the lid it would take something like 30 seconds to ...
12
votes
7answers
2k views

How do I identify which CPU a MacBook uses?

I'd like to identify which CPU this notebook is using, in terms of code names such as "Ivy Bridge" and "Haswell". The little Apple logo in the upper left shows some information, but not this.
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vote
1answer
141 views

High CPU utilization due to Firefox in El Capitan 10.11.4

I am using Firefox with 10-14 open tabs (AWS console, JIRA, GitLab, etc).My Mac hangs due to high CPU utilization by Firefox as per Activity Monitor. Can someone help me with this. Github Gist link ...
0
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1answer
279 views

How to stop kernel_task from constantly using over 400% CPU?

Configuration: Model Name: Mac mini (Late 2012) Model Identifier: Macmini6,2 System Version: OS X v10.11.3 (El Capitan) For the past few weeks, kernel_task has been using over 400% CPU and its ...
10
votes
3answers
6k views

CPU Pushed to Too Much Usage by kernel_task

I have a Macbook Pro Retina with the following hardware: Model Name: MacBook Pro Model Identifier: MacBookPro11,1 Processor Name: Intel Core i5 Processor Speed: 2.4 GHz Number of Processors: 1 ...
0
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1answer
50 views

300% of my CPU is being used? [duplicate]

I ran a Java applet, and it used over 200% of my CPU.... It actually rose to over 400% after I took the screenshot. How is this possible? Did Apple secretly hide extra cores on my Macbook, or did ...
3
votes
1answer
44 views

Is there any part of OSX that gets a significant speed boost from Intel AES instructions?

I've been comparing some specs between Mac Pro models, specifically with the jump from Harpertown (a.k.a. Core 2) to Gulftown/Westmere (a.k.a. Core i7). While there were expected incremental ...
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1answer
90 views

Optimise use of hardware under Mac + Windows in virtual machine

I use a macbook pro with OS X El Capitan 10.11.4, 2,5 GHz Intel Core i7 and 8 GB 1333 MHz DDR3. I need to code in Visual Studio and use Microsoft Excel for Windows, thus I installed Parallels ...
0
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1answer
207 views

macbook air mid 13 overheating

My set up is macbook air mid 13 with i7 processor and 8GB of ram running OS X Yosemite. Which is plenty for my use, at least it has been. I usually have no more than 3 apps running as notes, reminders ...
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votes
1answer
12 views

Change Activity Monitor update speed?

When viewing the CPU Load on Activity Monitor today, I was curious as how to make Activity Monitor update the chart and data faster. Is there a setting to change the update speed for Activity Monitor?...
6
votes
1answer
148 views

CPU Die temperatures reaches 90° C, is that normal?

My Macbook Air 13", Mid 2011, got heated and is slow in working. I noticed that CPU Die temperature reaches 90° C, is that normal? I've changed my fan recently but still get this issue.
0
votes
1answer
44 views

What maximum OpenGL context do the Macbook Pro's support on Bootcamp Windows

I'm Looking to get MacBook Pro. Is there a max OpenGL context? I understand that on OS X it is 4.1, does this change when booting in Windows, and is this diferrent or the same for the three models? ...
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vote
1answer
74 views

Do Sophos and Spotlight conflict and if so, how can I run both applications without problems?

I just got a brand new 13" MacBook Pro at work. I have noticed that Spotlight has been running constantly giving me ~4 hours of battery life. The motivation for getting this laptop was to have the ...
13
votes
3answers
5k views

CPU usage is too high with Yosemite and an external monitor

I use Yosemite 10.10.4 on my MacBook Pro (2012). I used to work with an external monitor: Apple Thunderbolt 27" monitor. The issue is that, according to Activity Monitor, the kernel_task process ...
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vote
0answers
63 views

Why a sudden increase in CPU when battery low?

My Macbook Pro (Retina 13" late 2013, OSX 10.10.5) has fine battery life overall - this is not the problem. However, when the battery drops below about 8%, and before I normally get any "your ...
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0answers
22 views

Limiting Mac Pro (late 2013) power draw

I'm planning to buy a trashcan mac pro, but I have strict limits about power draw. Is there any trick to limit cpu frequency? You can do so quite easily, for example, in windows and linux. Limiting ...
1
vote
0answers
259 views

maspushagent using CPU

[retina MacBook Pro 15", Late 2013, OS X 10.11.4] I always keep Activity Monitor running, and just noticed that CPU usage was up significantly. The process maspushagent (owned by me) has now been ...
1
vote
1answer
607 views

Why does VTEncoderXPCService take up all my cpu?

2010 Macbook Pro. Pretty frequently, my mac will spend over 100% cpu on VTEncoderXPCService. It causes the fan to spin up and it causes the computer to get hot. ps -ef | grep -i vtencoder shows ...
46
votes
6answers
33k views

“powerd” process uses a lot of CPU

Oftentimes, after I wake my Mac from sleep, powerd (which is the power management daemon? Which in particular deals with sleeping the Mac and waking it?) uses high CPU, usually around 25% to 50% on my ...
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1answer
3k views

How to disable HyperThreading on Mac OS X Yosemite?

I read that on previous versions of OS X it was possible via hwprefs but I didn't figure out how to use it on 10.10.* (looks like it was removed). I need to disable HyperThreading for Wineskin.
4
votes
3answers
12k views

Very high kernel_task CPU usage after updating to Yosemite 10.10.4

I updated to 10.10.4 on July 1, and ever since I've had very high CPU usage - roughly 270%, i.e. two and a half of four processors - by kernel_task. It appears on login for about five minutes, then ...
3
votes
0answers
68 views

CLI: get CPU real speed (e.g. Intel SpeedStepping)

Can you query for the real CPU speed in OS X command line/terminal? $ system_processor – only provides the hardware spec info. $ sysctl hw.cpufrequency – only provides the hardware spec info. $ ...
0
votes
2answers
49 views

Many strange issues with 2009 Macbook Pro running 10.10.5

my wifes macbook pro started acting very strange this evening, and i can't seem to figure out what is wrong with it at all. here is a list of various issues that all seemingly started tonight: ...
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0answers
21 views

Mac Pro Tower, 1 or 2 CPUs

I'd like to know whether a 4,1/5,1 Mac Pro with dual processor board can actually work with just one CPU installed.
2
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2answers
1k views

Get cpu usage per core on the command line

Activity monitor allows users to see the cpu usage on a per-core basis (for multicore machines, e.g. my MacBook Pro). Is there a way to find the percent usage of each core/processor via the command ...
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2answers
108 views

How does my dual core i5 in my MacBook Pro have more than 400% CPU usage? [duplicate]

I've got the Early-2015 13" MacBook Pro (2.7 GHz i5) and whilst I was building Smart Previews for all my 1600+ photos in Lightroom 5 I noticed that the fan had come on (unusually) and that the laptop ...
1
vote
1answer
367 views

cpu is 100% used, yet no application shows significant usage

Since a few days my IMac started showing weird behaviour. In Activity Monitor it shows that my CPU is 100% used. Literally 0% idle, but there are no Applications using anywhere near this much ...
0
votes
1answer
38 views

Memory/CPU usage comparison between two MacBook Pros

I recently switched from a 2014 mid MacBook Pro Retina with 2.7 GHz and 8 GB of RAM to a 3.1 GHz and 16 GB of RAM. I noticed something very strange which is that 1) when I am dong very basic tasks ...
0
votes
1answer
73 views

Mac Pro 4,1 CPU upgrade

I own a Mac Pro 4,1 (single socket) with a Nehalem Quad-Core CPU. I'd like to upgrade it with a six-core Westmere processor. Now, what I have to do prior to installation of the Westmere processor? ...
2
votes
2answers
206 views

Check if G5 is a SMP one?

How do I check if a G5 PPC mac has 2 CPUs or not? When booting it up under Linux (Debian 8) only one CPU seems to be detected: cat /proc/cpuinfo processor : 0 cpu : PPC970FX, altivec ...