MacBook Pro :: 13" Running 100% OK Then When Is 5% Battery Left Kernel_task Eats 300% Of CPU
Apr 14, 2012
I recently did a Lion clean install and since then im having this wierd issue..I already saw some cases that the kernel_task was eating too much cpu but that was random and caused by flash player.. mine is different.. it only happens when i have less than 5% battery and it stops when i connect the magsafe. I already tried PRAM reset.. already tried uninstall flash player but with no luck. What can i do ?
Info:
MacBook Pro, Mac OS X (10.7.3)
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Dec 26, 2010
This is my first post, and I apologize as it's a little long. I just wanted to get the whole story on the table and clarified.I've had one of the new Aluminum 13" MacBooks (2.0GHz C2D) since Christmas Eve. A few weeks ago, it accidentally fell off my desk at work (not a far drop , but far enough for my heart to stop for a few minutes) when I got tripped up in the power cord under the desk.
For all intents and purposes, the MacBok seemed to work fine. I had one of our IT staff, who happened to be a trained Apple repair tech, take a look at it; the only real damage was that the display hinge had been knocked a little out of alignment. Just ot be on the safe side, I took the machine to the Apple Store, where they told me not to worry about attempting to get the hinge fixed (because I'd be paying a lot of money for such minor work), and the Genius sold me a hardcover plastic Speck case for the MacBook.
While the Speck case certainly looked nice and madethe already sturdy laptop feel sturdier and "protected", I was a little concerned about the amount of heat the machine was giving off within the case. On Sunday, I unplugged the machine from the MagSafe charger for a few hours and left it closed in sleep mode. When I woke it back up, the fan on the left continually gave off some sort of high-pitched whine whenever the computer was in idle mode.
I Googled, searching this site and others, and read about the "CPU whine" in the previous generation MacBooks and MacBook Pros. I also saw where a few people with new Aluminum MacBooks were having this same issue or something similar:
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It seems to only make the noise when the computer is running off of the battery - plugging in the MagSafe charger makes the noise quiet 85% of the time (I've found that plugging, unplugging, and replugging will not stop the whine from occurring).
I tried installing QuietMBP as was recommended in some posts, but the only setting that will stop the computer from whining is the "highest" setting (that is, allowing the processor 0 seconds of idle time), which causes QuietMBP to eat up 30% of my processor usage in Activity Monitor and to start the fans going (and, presumably, to significantly lower my battery life).
I don't know whether all of this was the result of the MacBook falling, from it overheating in the case, or something that "just happened". I set up an appointment with the Genius bar for today at 4 PM, but Idiscovered another odd occurance when I set up a new account for the Apple Store (rather than give them my password)
The noise never happened under the new account. Never. I left the machine idle until any and all initial processes were done. No noise. I checked Activity Monitor for stray processes. None. And no noise.
Now I'm bewildered. Could something have gone wrong somewhere in my account, leading to a corruption of a power management utility or process? I'm not canceling my appointment, but I am going to try a few things before I leave. I've already repaired disk permissions, and I'm about ot reinstall the 10.5.6 OS X combo update. Should I try to reset the PRAM too? What other options should I be looking at?
Or should I just wait, and let the Genius Bar folks look into it? As a note, I'm aware I may have to pay for any repairs because they may or may not blame them on the MacBook having dropped (despite two to three weeks passing between the fall and this issue arising), and I'm okay with paying for reapirs (though I will try my best to argue my case, of course).
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Apr 1, 2012
Just got the MBP 13 inch not too long ago and this is going on. The fan won't shut off and the computer is running slow.
Info:
MacBook Pro, Mac OS X (10.7.3)
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Aug 17, 2010
calibrating my battery for the first time this morning. i just opened my macbook pro to see that the time left icon jumps every minute. it goes from 8:50 to 12:38 to 6:54 to 11:37 to 7:40! and now it went from 8:45 to 9:19! the percentage remaining is consistent and correct but the time left is way out of whack! sorry for the slang! now it went from 9:19 to 9:11 then 8:47. i have the screen at the lowest brightness, no backlit keyboard, nothing else running except firefox. i wasnt aware that i was supposed to calibrate my battery and its been about 3 months since i bought this. now its at 8:37 now 8:18. this is quite
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Jun 18, 2010
I just turned on my 13" MBP and got this message. Apparently, this is supposed to come up when there is only like 5% charge left. My battery indicator at the top of the screen said there was 22% charge left. Also, according to IStat, my battery's health has already dropped down to 97% after only about 2 weeks and 5 cycles. Is this normal? I'm going to try recallibrating my battery by fully charging it and then letting it fully drain. Is there a good chance that this solves this problem?
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Oct 27, 2010
My Macbook Pro keeps shutting down before I reach zero percent battery and often when the battery still has 25% left. I am wondering if this is a software issue that may be fixed or if there is something incompatible with my hardware. I am running 10.6.4 with a 2.16 GHz Intel Core Duo, 2 GB 667 MHz DDR2 SDRAM memory bought in April of 2007. My mac was originally running Tiger, but a few months ago I updated to Snow Leopard.
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Aug 12, 2010
I have already run the battery down to zero left it over night and started it up and it had 2% so I ran that down again. Is it now suffice to say that it is dead? Or should I leave it for the rest of the day and try to turn it on and run it down once more
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Mar 30, 2012
Mba didn't power up when I had AC adapter plugged in. Finally,I got my mba charged after a restart.Do I need to take my mba to apple store?
Info:MacBook Air, Mac OS X (10.7), MC968
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Mar 29, 2010
Coconut Battery is showing that I only have about half of my original battery max limit left, but now I'm getting a message that says "Service Battery" when I check battery info from the icon on the top of the screen. Anything at all I can do at this point, short of buying a new battery?
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Jul 7, 2010
A little while later I notice the MBP felt like it was running when I touched it. It was vibrating from the HD running. I didn't think much of this.
I just now tried to turn my MBP on and it wouldn't. I decide to plug it in. When it turned on it did so for about 2 seconds, turned off, then turned back on. It then took a long time to boot up. When it finally did boot, it told me that the clock was all out of whack and I noticed tons of my settings had been reverted to default. I then check the battery to see that it is charging but the level is at 1%! When I shut the MBP lid earlier to put it to sleep the battery was at least 50%.
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Feb 8, 2012
I have my mbp just 3 weeks old and I tried to calibrate the battery just few hrs ago. I continuously used my mbp until the battery level reached to 2% (the warning message showed when it was 6%). Just then I had to receive a phone call. When I was busy talking, I noticed that the mbp has gone to sleep mode but when I returned (2-3 mins later), I found it shut down. Well, I think it should have remained to sleep mode but it didn't.
Then after an hour I connected the power cord and switched on and noticed a progress bar which I saw for the first time. I have been charging it for 40-50 mins, now. Also the health of my battery keeps fluctuating between 95-100 %. istat shows this. Is this normal? So what I want to know is, Is this normal for mbp to shut down when the battery reach that low? OR there is some problem in my MBP?
Info:
MacBook Pro, Mac OS X (10.7.2), 2.4GHz, 500GB HDD
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Jun 19, 2014
So i noticed I had no charge left in my little battery icon on my Macbook Pro so I plugged in my charger. There is a little green light on my charger but it is not charging the macbook pro.
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Apr 8, 2009
My MBA (Ver A 1.6) just started getting the "sluggish" symptoms. Started noticing that my CPU gets stuck at 90~100% after about 30 min of use, since about a week ago. I keep restarting the computer and after about 30 min, my MBA becomes very sluggish and iStat shows both CPU bars all the way to about 100%.
When this happens, the activity monitor shows the kernel_task at 125~130. This is too high, right? If it is, what's causing this? I can't imagine that any of the programs that I regularly use will cause this.
Here's the screen shot of the activity monitor.
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Mar 12, 2012
security copy eats my storage space on my MBP
Info:Mac Pro, Mac OS X (10.7.2)
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May 27, 2012
i was playing Diablo3 when i suddenly experienced heavy, unusual lag. I tried to reboot to see if that could even things out. No success. It took longer then usual to boot up, and when i finally reached the login-windows asking for password, it wouldent react to my typing and clicking for about 5 minutes. I could move around the mouse and the keyboard did get signal (it un-dimmed the scren when i pushed any key after letting it dim over time).
Then i tried to do a clean install of OS X Snow Leopard (formating the drive and then install). After longer then usual,reached the "choose your language" window. This window too had extreem long respond-time. I managed to start the installation but it stopped at 33minutes remaining, giving me the "Install Failed" window. this told me "Mac OS X could not be installed on your computer. The installer could not copy the necessary support fies. Click restart to restart your computer and try again.". I tried it again but it gave me the same result.
it made me believe the hardware was the problem. First i swapped the Optical Drive with an older vrsion MacBook (2008), this gave me the same install-problem (stopped at 33mins left) Then i swapped HDD with the older MacBook. It managed to boot and start "normally" with exactly the same problems as the original HDD. The first thing that gets to my mind is that something might be fried inside the computer.
I restored the original HDD with TimeMachine (needless to say i still got the problem). I'm in the middle of my exam-papers, so its reaelly annoying its happening now.I also tried installing OS X SL using an external HDD with an image of the installer disk made in disk utilities, but this only gives me "kernel error" during booting (the annoying dimmed screen with a black box in the middle telling you to restart).
Today i took a look in the Activity Monitor and it shows the CPU acting strange, spending 100-120% on kernel_task ALL the time (see added picture).Is something wrong with the CPU? Is it possible to fry only one core in a CPU leaving the others intact?I have different components available for change as long as they match each other (Macbook pro 2010 and MacBook 2008).
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Info:
MacBook Pro, Mac OS X (10.6.8)
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Dec 30, 2009
My fiancee's Macbook is having an issue where the syslog will take over an incredible amount of the CPU (Activity Monitor frequently has it pegged in the high-90s-percentile) and run continuously, making the machine heat up and causing the fans to run continuously, which drains the battery quickly. I've done a bunch of searches on it, but the only fixes I've found refer to syslogd (which is not causing problems on her machine), not syslog.
I've still tried to apply a number of those fixes which have all failed, including manually killing the process in Activity Monitor (which caused huge Airport/Time Capsule problems on my own MBP) and deleting the asl.db file (which didn't help at all)... kind of running out of options here and getting frustrated.She's running OS 10.5.8 on a 2.16 GHz chip with 1GB of RAM.
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Jun 5, 2009
You know how when the battery dies the mac restarts in the exact way you left it? well, i was wondering if there was any way that i could put in that mode on my own (without pulling out the battery or hurting the mac).
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Dec 3, 2010
I started using my iMac today (not this gen the last gen) and it was fine yesterday but today it has been extremely slow. Its only a year old and now its suddenly taking 30 seconds to open up Finder and Mail and Chrome take a long time to start up. Also I noticed that the 3 buttons (red, orange, and green) at the top left of every window are grayed out.
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Sep 24, 2009
I booted up my MacBook this morning and a grey progress bar appeared at the bottom along with the normal spinner. Well after this update installed (thats what Im thinking it was) it warned me I had no disk space left. A had 57% last night! What ever that progress bar did ate up 38.7GBs of space! If anyone has help to get back my disk space it would be nice. I only have 500MBs left.
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Apr 14, 2012
Battery is extremely hot and fan is always running. Regardless if I am watching a video or writing a document
Info:
MacBook Pro
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Jun 5, 2012
my macbook pro not charging. the battery is running low on 20 percent i puted it on charging it says not charging and light in charger is green what the problem can be?
Info:
MacBook Pro, iOS 5.1.1
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Sep 5, 2014
The battery icon on my macbook pro has a 'X' on top of it. The machine turns off as soon as i remove the power cable from the mac. It turns on only when i remove the battery and again put it back on. Once i do this, the battery shows 100%. After i leave it connected to the power for an hour or so, the 'X' appears again!! My macbook is not under warranty.
Its a 15 inch, Late 2008 model running on OS X 10.9.4.
Info:
MacBook Pro, OS X Mavericks (10.9.4)
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Dec 2, 2010
I have a late 2007 MBP 15inch 2.33Ghz Core 2 Duo. I have had since new and no problems. Over this last week I have had the same issue a couple of times. The MBP just switches itself off. The first time it did it, it was running on battery (I was using Aperture) and had 60% power available. It would refuse to re-start until I connected it to the mains and then it ran fine.
Then it did the same thing overnight at some point. I had left it connected to the mains (as I always do at home), had shut the lid to put it into sleep mode. When I came back it was switched off. No-one had touched it whilst I was away but yet it had just turned itself off.The only thing that I noticed was that when I started it up both times the little light on the magsafe connecter kept flashing between orange and green. However when the computer booted into OS X both times it showed a reasonable amount of power in the battery.
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Oct 27, 2009
if I'm going to be running windows 7 through bootcamp almost full time.. would it better to get the 15" with 9400m only since the other models I've heard default to 9600 under windows. I don't play games and want to have good battery life while using windows.. so does the 15" w/ 9400m only seem like the better option for this?
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Jan 16, 2010
I have a MacBook (purchased in May) that has issues with the battery status. When the MagSafe Adapter is plugged in, it shows that the battery is charging, but when the MagSafe Adapter is unplugged from the computer, the computer does not recognize that it is running on battery power. (It still shows that it is running on A/C power.) I have already reset the System Management Controller, and it didn't work. What else can I do?
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May 26, 2010
I just got the replacement battery from Ebay seller from China claiming it is the genuine battery. I am using it right now, when I plug the ac connector it doesn't turn red to show me that it is charging or something also the battery icon is showing an X but the battery is still running. I paid $60 for it.
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Jul 29, 2010
My last battery popped, and on Monday, Apple store gave me a new one. The lady told me that it was best not to keep the power connected all the time. So I charged it to 100% and pulled the plug. It runs down incredibly fast. This morning it's been unplugged for almost an hour, doing just a bunch of web searches, and it's already down to 37%. This isn't normal, is it? I was able to watch a 2 hour movie on a full charge for my old battery. Does the charge get better over time?
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Jun 17, 2012
My 2012 MacBook pro has a fan running on high from the moment I turn it on and my battery has an 'x' on it.
Info:
MacBook Pro
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Jun 24, 2012
I have a 27" iMac running OSX Lion 10.7.3. Some time in the last 2-3 weeks, it has started to getting into a state where the kernel_task is using 100% of one CPU constantly. When this happens, it also kills my Internet connection and I cannot use the browser, email, Skype, Twitter, etc. I have tried putting it to sleep, closing all programs that are open checked the process list with ps to see if I could find anything weird, but it still keeps happening.
I have to restart the computer whenever this happens. It might happen again in a couple of minutes or not for several hours, but happen it does. I thought it might be Chrome or Mail for a while, but it happened today when those were not running.
Info:
iMac, Mac OS X (10.7.3)
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Sep 4, 2009
My Apple Wireless Keyboard Stopped Working, i don't know what problem it is. its just stop, after i leave it one week without battery. this keyboard just 2 months old, any suggestion so i can get it repaired...?, is it possible to bring keyboard to apple retailer, and get it fixed there ?
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