My Macbook Pro (Yosemite) early 2011 sometimes unexpectedly turns off when running heavy tasks on battery power. Is there a way to confirm this is because of overheating? Here's a part of system.log from the moment of shutdown. What other logs can I read? > Feb 24 08:22:56 macs-MacBook-Pro.local Skype: Failed to get > contents of directory "/Users/mac/Library/Logs/Skype". The file > “Skype” couldn’t be opened because there is no such file. Feb 24 > > 08:24:47 macs-MacBook-Pro systemstatsd: assertion failed: 14C109: > systemstatsd + 4269 [A886B71F-3A31-3324-9B30-5143FDF4ECCB]: 0xb Feb 24 > > 08:24:47 macs-MacBook-Pro com.apple.xpc.launchd > (com.apple.systemstatsd): Service exited with abnormal code: 1 > > Feb 24 08:54:10 localhost bootlog: BOOT_TIME 1424764450 0

I have a mid-2009 13" core 2 Duo MacBook Pro running High Sierra w/ upgraded 8 Gb RAM. On Activity Monitor I usually get 20-40% 'idle CPU' with only Finder, Safari (3 tabs) and Activity Monitor opened. There's also nothing plugged in. 'User CPU' load varies quite a lot, but never above 'System CPU' which is always around 50%. So I wonder if those are normal CPU loads for my mac. My mac always feels kind of hot despite having just these 3 apps opened and using it on a flat, wooden surface, slightly below room temperature with no direct sunlight. I read that it could be an issue with the cooling system, but the fan seems to work fine and I already took some dust off inside my mac (without detaching/disassembling anything except the metal case; maybe I should clean some parts separately?). Apple Hardware Test also gave me nothing on a simple test. Thank you to anyone who might respond.

On my macbook pro 2019 I'm running into this issue, where the infamous kernel_task starts blocking my computer after a couple of hours. I know that many people are experiencing similar issues for many different reasons, but none of the approaches I've researched so far seem to work for me. So I really hope you can help me. - Typically I'm working for a couple of hours using basic stuff like Zoom, Chrome and my programming IDE and everything seems fine. No lags etc. Macs Fan Control is showing the following measurements: - Then, after 4-5 hours suddenly my whole computer gets very laggy. After checking the Activity monitor, I can see that kernel_task is taking up 100-300% CPU percentage. - This kernel_task process seems to be a system strategy to block CPU usage and prevent further heating of the hardware that could potentially cause damage. - This happens instantly after 4-5 hours of normal work. I do not run extra programs. The temperatures are still at ~60-65°C. - I can stop the lagging, if I close almost all programs. But as soon as I open up some basic programs again (Zoom, Chrome) it starts lagging again I'm now wondering on how to further investigate this issue and identify the cause of the problem: - While Macs Fan Control is showing that the fans run at max speed, I don't feel very much air coming out of the macbook case. Maybe the fans don't work properly or are dirty? - Can you tell me why my macbook decides to start kernel_task if the CPU and GPU temperature are at ~60-65°C? This doesn't seem too hot to me. Things I've tried: - Making sure the laptop is placed on a good stand. - Unplugging all devices including monitors, power supply etc. - Resetting SMC ----------------------------------- **EDIT: Cleaning the fans actually solved my issue!**

It is important that I give a detailed description of the event MacBook model MacBookPro9,2 (mid-2012), MD101LL/A, Core i5, 16G RAM, SSD 500GB, bought in 2014 Used up to a week before the disaster, it showed no signs of abating. Yesterday, I take him out of his backpack and immediately notice these symptoms: - OS loading too slow almost seemed to me to be blocked - fan (which seems to almost not exist), after 10 seconds of power on , it accelerated slowly and then went like a turbine - login screen appears without the password box, which appears after about 1 minute - on password input, on key stroke the pass bullet it's shown after seconds - minutes and minutes to load desktop - on Activity Monitor CPU was full, flat line and kernel_task was what consumed the most, but we know to be a false positive - my MBP was completely stuck, a paperweight - I try to reset SMC, PRAM, I go into safe mode, but nothing happened **Important**: after hours on, with the CPU between 98 and 100%, the mac was not hot (just use FinalCut to understand what a hot mac is). The temperature was the classic temperature of an idle state. I also bought iStat Menu, but the mac was so slow it couldn't show any results. After all these tests, I make up my mind, I open the mac and unplug the SSD: same problem, fan too high. So, it's not a software problem. I unplugged everything. Everything. The motherboard remains with only the power supply and the fan: same symptom, after 10 seconds, slowly, became a turbine I do another searchs on the internet and someone was talking about dry thermal paste. I checked and mine, in fact, after more than 7 years (2014-2021), had become concrete. I haven't changed the thermal paste yet because when you look for it you never find it here, I ordered it on Amazon. So, with the heatsink in hand, I said "let's see what happens without it". I connect the power supply and the CPU, after 4 seconds, becomes a barbeque (my fingertip confirms this). But the strange thing remains the fan. It should accelerate almost immediately where it always takes those 10 seconds, slowly, and then get to high speed; as with the mounted heatsink, as with the boot. The hypotheses can be: - the thermal paste was so dry that with or without a heat sink the result is identical - the fan control chip is gone, but it would not explain why the CPU is so slow Ideas? Thanks ________________________________________ **UPDATE 2021-11-08** Thermal paste replaced. Nothing. Same scenario, same behaviour. Apple diagnostic says PFM006 and NDC001 ________________________________________ **UPDATE 2021-11-12** Found schematics. Sensors are soldered LINK **UPDATE 2021-11-12 part 2** "Miracle"!!! I removed the battery and started the MAC without battery. It seemed to have the same problem but then the fan started to slow down and the CPU became responsive. I post the results of iStat Menus. I reconnected the battery, the MAC continues to work correctly but the battery no longer charges; maybe I will have to replace it (I would say, after 7 years) *I'm writing to you from the MAC in question* Temp sensors

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 seperate entries of Google Chrome Helper in Activity Monitor, each individually using around %0.5 of my CPU. On YouTube, one of these can spike up to using %82, with a second using %22. I don't understand the math behind it but its evident in the screenshots I took. I own an up-to-date MacBook Pro (13-inch, Mid 2012) so it could be a result of an old system but only Chrome and YouTube (or just videos) are causing this issue. Here are some things I’ve attempted to control / solve this: * updating FlashPlayer * disabling extentions * turning off Unsandboxed plug-in access to "not allow any site to use a plug-in to access [my] computer" * turning off JavaScript (which, of course, just stopped the page from loading in - very power efficient and cool, but not the trade off I had hoped to accomplish) I've tried other web browsing apps and they net similar results as Chrome. I believe it has something to do with videos in general that are being served At the moment, I have had to use an app called MacsFanControl so my fan stops the CPU and computer from overheating as it used to get to around 50˚C. Now, it is sits at 40˚C with the fan running on high to prevent it increasing. Am I missing controls or options to have less heat from the CPU of this era MacBook Pro?

This might be pretty obvious that the sensor is bad and I need a replacement, but this sensor is very hard to get here in Brazil, so I'm hoping there's a way to fix the RPM sensor of the MacMini Late 2009. This is what happens: Sometimes the fan lost it's reading and the speed tops maximum with an annoying noise. I noted this happens when in fact the fan needs to speedup. So I stressed the CPU to get a higher RPM on the fans and this is what happens. When the machine is idle, it behaves as expected: In fact I've changed the default hard disk for and SSD drive, upgraded to 8GB of RAM an installed a patched version of Catalina, since it's non supported, pretty "standard" thing to do on this old machines. So my question is, anyone have a similar situation? Any workaround or fix? And I must answer: can it be related with the installation of an unsupported release of macOS? EDIT: That's really a hardware issue, this happens on a Linux install that I've made on the machine too.

I just recently placed a new battery and speakers into a 2015 15” MacBook Pro. To do this I had to take out the entire logic board. Obviously, the fans have to be in the correct position as you can only orientate them one way when installing them. However, cool air now seems to be flowing out of the bottom side grills, and is being sucked in from the hinge area. The airflow has somehow been reversed. I have no idea how this is possible, but it is affecting the temp of the cpu. If anyone has any recommendations on what to do, it would be greatly appreciated.

I am playing games on my Mac. and the machine gets red hot. I'd like to get a cooling pad for it to keep it calm. After doing a lot of searching I'm thinking of getting a CoolMaster Notepal Infinite Evo Will this cooling pad work well for my machine? I am not able to get much variety of cooling pads in my area. Also, I am attaching links to other cooling pads available:Link 1 , Link 2 .

I don't know why, but these days my fans for some reason run throughout the day. When the fans start spinning the computer becomes extremely laggy. I have also tried running Macs Fan Control app after reading about it , but my system still hits 80°C. At that time it also freezes for 5 seconds to 2 minutes. So any suggestions as to why it might be happening, and how I can fix it? System: Running macOS High Sierra 10.13.3 MacBook Pro (15-inch, Mid 2012) Processor: 2.3 GHz Intel Core i7

My 2019 base MBP runs at 85-90℃ while playing the game "bad north" which is a simple game, it used to run alright in the past days (at ~60℃) Today, It keeps jumping to 85-90℃ and sometimes the game just becomes unplayable. The fans are also running at max (7200rpm) the whole time the game is open. I tried closing all other applications and even turning off Wi-Fi & Bluetooth, not to mention lowering the game's graphics, but it keeps happening... Do I need a cooling pad to game a bit?

I found on a blog post about the Macbook Pro 2019. It shows its cooling system. I am curious about how this works, because in the animation, cool air comes from the side, but there is no vent on the sides nor the bottom of this device chassis. Anything I'm missing here? How does this work?  

I have a Mac Mini 1.1 on which I updated the EFI firmware to v2.1 and installed Mac OS X 10.7 I'm wondering how I can cool the Mac with an external fan somehow. I found the internal cooling to be slow, so I put an external handmade USB fan on the system in an open case and this works well for my purpose. The problem with the external fan is that when I put the computer to sleep, the fan keeps on working and I don't know how to make it stop. I don't want to use the system fan as it looks very weak and makes a lot of noise at 3000 rpm. I don't like noise.

Macbook Pro 15" 2011 I've had Macs Fan Control for more than a year, and it spins my MB's fans at the max 5500-6000 rpm most of the time and I'm used to that noise because cooling is paramount. But yesterday one of the fans started to be extremely noisy. It makes a sound as if the blades were scraping against something. The odd thing is that the sound goes away for some time (returns seemingly at random) if I put MB to sleep or reboot it. But the sound will become worse if it appeared at ~6000 rpm and I set MFC to the lowest 2000 rpm. So the only way to stop fans from doing that annoying noise is to stop it completely and start back up. So the question is, is there a way to do it quickly or do I have to wait my MB to 'fall asleep' every time? p.s. I know that I should replace the fan, but I need some solution better than cmd+option+eject+wait until I do.

**Summary** I am having a problem where using Expose to drag a window from one Space to another causes an enormous slowdown that looks almost comical - like the machine turns into a ouija board and load spikes to easily over **200**(!) during the time it is going through "fits" Here is a video of the an incidence of this problem. **Conditions** 1. Fresh Catalina install 2. MacBook 12,1 with dual core 3.1 GHz i7 CPU, 16 GB RAM and 1 TB SSD 3. Currently in the process of "building from scratch" and installing my prescribed software and tools **Walkthrough of the Problem** 1. I invoke the Screens in the heading for each "Desktop" using Expose and attempt to move a window from one Screen to another 2. The behavior of moving a window as I drag has action where the lag of dragging movements enter a state of ghostly slow-motion. where the movement follows a sort of "possessed" pattern. 3. As my queue UI interactions play out, it looks like it has a mind of its own. (All further UI interaction appears to be ignored, but in actuality it is getting queued and will continue to run at a fraction of real-time speed.) 4. I need to stop and wait for all of those input actions to complete. This can take several minutes, sometimes over 15 if I try to do things like click on an icon in the dock, move a window within a specific Space, or other do what a frustrated user might do while his machine seems unresponsive. **Side Effects** *Massive Load Spike* The immediate reason for this would appear because the system load which already was running between 3-4 (computer has 4 effective CPUs, so just under nominal efficiency when it is effectively idle from human input, it will shoot up to a very high number (well over 100 or 200 while going through these antics) and it will take several minutes for the load "settle down" after the slow-mo effects stop, and that's just for it to get from 200 down to about 25 where it will plateau for easily another another 10 minutes. *Queuing of System Processes* As I am still in the process of building my computer from scratch based on a build template document that I made to manually install my software tools setup on a fresh machine, I find this enormously disconcerting. **Build Details** 1. Use updated to be Catalina compliant with things like DeviceKit 2. Some open source tools require explicit security authorization to even install, but the seem like innocuous exceptions which don't require additional kernel drivers and I hope they will be compliant by January. 3. I don't use "junk ware" that could easily border on Malware (such as "virus protection). 4. I do use brew cask install or any software that I can. 5. For anything else, I use App Store. **Initial Conclusions** I don't have any idea if these apps have any correlation to this behavior or not. When this does happen, I will often system processes come up and take more than 50% of the CPU, but I attribute this to the fact that they are queuing because of the absurdly high load and more a symptom than a cause of my problems. I have even given up Chrome for Safari in an attempt to better make use of shared resources and minimize deviating from the Apple nest. I have already turned on "Reduce Motion" and "Reduce Transparency" for Accessibility -> Display but it had no impact. **Possible Heat Problem?** One theory I had was that my fans are dirty and not cooling my CPU well. I did have performance problems when this machine was running Mojave with 30-90 second lock-ups, but since I had upgraded it through at least 3 OS versions, I attributed it to KEXT cruft or other junk software I used when I was less careful. The fans do spin up just fine as the CPUs heat up, but the CPU core temp wavers between 70°C and 80°C even when load is under 4. Therefore, I am wondering if all of this is simply CPU clipping from heat but I don't know where the temp will induce this fail-safe. If I simply cannot rule out blocked airflow I will crack this baby open and give it the canned air blast, but seeing as I replaced the fans and battery just 14 months ago that would be surprising as I don't work in a lint factory. **What I am Hoping to Achieve by Posting This** In any event, while I don't expect anyone to identify why Expose is behaving this way (though I would be grateful for some troubleshooting tips as I am only a few days into using Catalina.) What I was hoping for was if anyone was aware of how I might turn off any of the gratuitous animation features introduced by Catalina that might be exacerbating this problem. **Update 11/11/19 17:20** After running in Safe Mode and loading nearly every app I couldn't replicate the problem, even though things like scrolling were definitely affected. There didn't seem to be any temp problems and spikes to over 90° quickly subsided so unless this is a slow buildup heat issue, I don't think that is it. One thing I failed to mention was that when this problem occurred, there was 3.7 GB in the 5 GB swap space. Starting up the machine normally and running the apps like I did in Safe Mode also didn't recreate those problems, but swap is still unused. I should have noted this, but in the past, I have correlated the sluggishness of the Expose animation with how much is in swap. My new theory is that there is some memory leaking going on that uses up virtual memory and the slowness and load is a result of relentless paging. I think I will only be able to substantiate this after letting my machine have an uptime of more than a day or two with lots of apps open so I can see. Then I can identify which apps have the highest page rates. **Update 11/12/19 01:54** After opening it up and not seeing much dust at all I lifted the cooling plate to check the thermal paste which was dried and barely present. I added some fresh paste after cleaning both surfaces but I am not sure if I used too much or the surfaces weren't both clean enough but I am finding temps seeming to spike over 100°C occasionally and it overall running hotter, though the hot peaks are only instantaneous. I ran GeekBench both before and after, both in Safe and regular mode and performance results were effectively the same. Results are actually slightly higher than the benchmarks established for my model. It seems awfully hot but it is not affecting performance any. Having read articles stating that the i7 can safely operate at 100°C (though some authorities say it is too hot for any duration). I installed the Intel Power Gadget and it shows my overage clocking is about 2.45 GHz but that it does peak out at the stated 3.1 GHz so I don't think it is being clipped. Still, the performance mystery abounds, but one thing is for sure- it takes days if not weeks for all of the Catalina housekeeping on media and pictures to complete!

On the Mac mini (2018) , where is the air inlet for cooling the innards of this computer? I have looked at the iFixit teardown . It shows the fan blowing out the broad outlet across the back of the Mac mini, below the USB-C ports. I certainly can feel the warm air exiting this outlet. ➥ Where does the air *enter* the Mac mini? The bottom is either solid metal or covered by the non-slip rubber. I see no other inlets on the backside. So I am left puzzled. I am concerned about not blocking the air inlet, to maximize cooling efficiency.

I have MBP 2017 (MPXT2) bought about 3 months ago. I noticed that when it heats enough, only right fan starts blowing away hot air. On the other hand the left side is not that hot and it is probably ok that I have never seen left fan working. I wonder is it expected behaviour for new MPB 2017 or the left fan is probably broken? I do not even know what can heat the left side because the GPU is built-in. Update: Used **Macs Fan control** as suggested. It shows only one fan.

I recently installed an SSD into my iMac and downloaded "Macs Fan Control" which works perfectly fine. However, when I plug in my external monitor via Thunderbolt, the GPU temperature increases for 10°C (50°F) to about 55°C (131°F) or something which I think is normal. Due to the temperature increase, the RPM of the ODD fan (which I use to cool the GPU) also increase to a hearable amount. (about 2000 RPM) I use following settings for the ODD cooler: - Sensor based value from GPU Diode - Temperature that fan speed will start to increase from: 45°C (113°F) - Maximum temperature: 70°C (158°F) Can or should I tweak my settings (increasing the temperature that fan speed will start to increase) without the risk of damaging the GPU?

Before I just rush into ripping apart my machine & putting new thermal paste on the CPU heatsinks, I thought I'd try running this past Ask Different. I have a 'Franken-Mac' Pro 4,1 with the full 5,1 upgrade. It now has dual 6-core 3.46GHz Xeons - X5690 64GB RAM *From comments 'Franken-Mac' = Non-stock model. Mac Pro 4,1, upgraded to higher 5,1 spec than was available when new. All Apple, but there was never a 3.46 model originally.* I have no idea what was in it before, as I bought it ready-upgraded. What worries me is that the 'main' temperatures reported by iStat Menus - which on this machine are the CPU A & B Tdiodes [not that I really know what they are] - are consistently out by about 15°C Under minimal load, this comes out as approx CPU A at 60°C & CPU B at only 45°C If I put the machine under load, I've seen that lift to perhaps 75°C & 60°C The booster fans always run at the roughly same speed as each other, whatever that speed might be, increasing with load of course. BTW, it's not always *exactly* 15° but around that value. I have an older Mac Pro 3,1 which, though iStat measures a different sensor for the 'main' temperature [CPU A & B Heatsink], is always within a degree, right now 35/36°C I'm not worried about the apparent temperature difference between the two machines, as not the same thing is being measured. So, my question is... Does anyone know if this difference between CPU A & B temperatures is normal, or if I need to be looking at the thermal paste etc? The airflow is clean. I do it regularly anyway & did it just before I posted this question. I've never stripped a Mac right down to the CPUs before [though I've done dozens of generic PCs over the years] so I wanted to get a second opinion. A small side question - does anyone know which is A & B, physically? Is A to the front, B to the rear? I know they're labelled on the PCB, but it's not visible until you strip them & I can't find a picture of sufficient clarity. *Solution to the side question* - CPU A is to the rear of the machine, so the air hitting it will have already passed over CPU B's heat-sink.

After experiencing crashing and freezing on [15" MacBook Pro 2017](https://support.apple.com/kb/SP756?locale=en_US) (macOS High Sierra), I started eliminating running programs that I thought might be causing the crashing as advised by an apple support employee. I immediately suspected that it might be smc fan control (A program that hasn't been updated since (https://www.eidac.de/)) After removing the program I noticed that the problems stopped. However it is useful to pre-emptively turn fan speed up before using a resource intensive program. My lap has also threatened to leave me if I don't resolve this issue. Has anyone else experienced this or am I alone? Are there other alternatives for fan control in osx.

How could I improve the performance of my MacBook and stop throttling? Although the CPU load is not by 100%, the CPU cores heat up to 100 degrees.