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.

learn more… | top users | synonyms

0
votes
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?
0
votes
0answers
18 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 ...
0
votes
0answers
32 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) ...
0
votes
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 ...
0
votes
0answers
11 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 ...
1
vote
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 ...
0
votes
3answers
76 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.
0
votes
0answers
26 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 ...
1
vote
0answers
35 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 ...
0
votes
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 ...
1
vote
2answers
321 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
votes
0answers
71 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 ...
0
votes
1answer
291 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 ...
0
votes
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 ...
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.
3
votes
1answer
46 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 ...
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 ...
1
vote
1answer
143 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 ...
1
vote
1answer
91 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 ...
-1
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
153 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.
1
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 ...
0
votes
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
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 ...
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? ...
1
vote
0answers
274 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
630 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 ...
3
votes
0answers
72 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: ...
1
vote
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.
1
vote
1answer
371 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? ...
1
vote
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 ...
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 ...
0
votes
1answer
38 views

Limit CPU when starting a task in terminal

I'm working on an application for part of a school project that simulates an operating system and which I launch using the Terminal. By nature it will consume all possible resources to loop over and ...
0
votes
0answers
30 views

How to make sense of >100% CPU usage and re-spawning of a force-quitted process?

My MBP was making loud noises again so I opened up my activity manager and I was baffled to see that the CPU usage of mutt is more than 100%. This is strange because all I was doing in it was to ...
0
votes
0answers
25 views

Diagnosing cooling issues on MacBook Air

I suspect the fan on my 2011 MacBook Air is not cooling efficiently, as it runs over 5000 RPM when I'm browsing the web and the CPU is around 75% idle. Is there any published benchmark for what the ...
0
votes
1answer
112 views

MacBook Pro 13" 2015 CPU and GPU temperatures

I've noticed that my new MacBook Pro 13" 2015 (MF839) is getting hot while playing browser games or watching models at sketchfab.com. Both CPU and GPU temperatures rise to 100-105 degrees (Celsius) ...
1
vote
1answer
182 views

High CPU and energy usage in Safari

Energy impact of Safari is extremely high on my Macbook Air Mid 2013 El Captian 10.11.2. It lead to high usage of CPU (Temperature ~65.0°C) and the CPU fan is running in full speed (6500.0 RPM) ...
10
votes
2answers
5k views

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 ...
4
votes
0answers
230 views

Is it possible to disable CPU throttling on a MacBook Pro with a completely dead (not recognized) battery?

I have a MBP late 2011 running El Capitan, recently my battery died (x over the icon and "no battery available" in the dropdown.) I've noticed since then that CPU intensive tasks are very slow, and I ...
0
votes
2answers
19 views

Is a “2 GHz Intel Core Duo” really the same as a “2 GHz Intel Core ***2*** Duo”

I'm trying to get Sling TV set up on an older iMac. It has 10.6 (the minimum required OS), 2.5 GB RAM (~2.5 times the required memory), and a 2 GHz Intel Core 2 Duo. However, the Sling TV web ...
3
votes
2answers
3k views

Macbook Pro 15“ vs 13” - Performance vs portability

Currently I've got a MacBook Pro 15" (mid-2010, model 6,2), with 8 GB RAM, 2,5 GHz i5 Processor and Intel HD Graphics 288 MB video card. Seeing as it's 5+ years old, I really need a new one, ...
0
votes
0answers
254 views

High CPU usage when Your iCloud session has expired

I have had this problem here: El Capitan: Your iCloud session has expired In addition to this I noticed that iTunes is using nearly 100% of the CPU and the fans go crazy. After logging and fixing ...
0
votes
0answers
157 views

excessive cpu usage from kernel_task after accidentally ripping Facetime HD camera connector off the logic board

Accidentally ripped off the Facetime HD camera cable of the logic board. Now whenever I boot into OS X kernel_task hogs all the cpu (500%). I could be wrong here, but my hunch is that because no ...
0
votes
1answer
64 views

According to System Information I have one processor and 2 cores, but when I open the 'CPU-usage' window in Activity Monitor I see 4 graphs [duplicate]

What does this 4 graphs mean and how are they related to my 2 cores? I have a MacBook Pro (13 inch medio 2012?
1
vote
2answers
972 views

What is “usernoted” and why is it eating my CPU?

For the past couple of weeks, a process identified as usernoted appeared to "take over" my machine after a few hours of use, eating over 99% of available CPU. Force quitting the process doesn't help; ...
0
votes
0answers
145 views

Macbook Air thinks it's overheating

Recently my Mid-2013 macbook air began to act like it's overheating. Upon boot the cpu fan almost immediately spins up to 100% (over 6000 rpm) and the cpu heavily thermal throttles. I am positive the ...
2
votes
1answer
176 views

“Wi-Fi” process in OSX El Capitan uses a lot of CPU

"Wi-Fi" process takes a lot of CPU almost all the time. Why is it happening, and how to fix it?