Intel Mac :: Why Is It Shutting Down By Itself
Apr 10, 2012
I have a late 2010 27in iMac and it has shut down randomly by itself 4 times in the last month or so, including twice in the last couple of days. I have 16G of RAM and am only using up to 8G ever. Just to be clear, it shuts down and does not restart automatically. I never have the screen brightness higher than half so I don't believe I am overheating it? I really want to know why this keeps happening.
Info:
iMac (27-inch Mid 2010), Mac OS X (10.7.3)
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May 3, 2012
My imac keeps shutting off - blank screen for no reason - when i click the mouse ot comes back on immediately to log-in screen - any body have any ideas how to reolve this or what the problem is
Info:iMac, Mac OS X (10.7.3)
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Feb 15, 2012
My iMac keeps shutting down by its self after a few hours
Info:
iMac, Mac OS X (10.7)
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Mar 22, 2012
I have an i mac (quad core) running on Mac os x 10.7.3. I am finding increasingly that despite me closing all programmes properly the mac doesnt shut down. I find it goes to the grey screen and the mac spiral appears, I have to push the power button to shut the machine down.
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Apr 15, 2012
After around 10 to 15 minutes of using Safari, no matter what website I'm on, it will suddenly close on me. A message will pop up saying something along the lines of - Safari unexpectedly closed - and will have the options to report, reopen or close. I know it would be useful for me to tell you exactly what it said, but by the time I opened up a new Safari and logged in, I've forgotten what it said, it did however mention "Steinberg" something.
Info:
iMac, Mac OS X (10.6.8)
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May 24, 2012
My iMac is shutting down whenever I try to open an app. Everything was going fine, then I tried to open Skype and was forced to shut down the computer using the power button (there was no error message, just this message to shut down using the power button). I restarted it and deleted Skype thinking there was something wrong with the app. Then I tried opening Firefox and it asked me to shut down again. And it does it whenever I try to oPen any app.
Info:iMac (21.5-inch Mid 2011)
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Jun 19, 2012
Brought my iMac to store because it kept shutting down and rebooting on its own. Been 12 days and still haven't heard back from them and when I call I get the run around of the computer repair being "in progress". What to do next?
Info:
iMac
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Jun 30, 2012
How do reload the iMac,,,it has a bad volume and keeps shutting my iMac
Info:iMac
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Jul 4, 2012
For the past two nights, my iMac has randomly completely shut down. I set it to sleep before going to bed. When I woke up, it was shut down. And the weird thing is that it was shut down, and when it started up, no applications or anything were open. Generally, I'll shut down and it keeps everything open and running, then when I turn it back on, everything is where it was. I don't know if I lost documents or anything... or everything. I've never seen this before since getting Lion.Â
I checked my energy saver schedule... I had it set to SLEEP at midnight. But it is never set to shut down or start up. And even if it was, why are all the apps closing when it shuts down?Â
Info:
iMac, Mac OS X (10.7), 2.7 i5 quad
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Mar 23, 2010
I have a MacBook which has recently been shutting down when it feels like :/ this all started a week or two ago (well not the shut downs but other issues that I'll get too), basically the fan I think has been knocked as it is bumping the top or something as the whirring is getting loud and it sounds like every now and again it hits something
Also CPU usage seems to be averaging out at 20% for Safari and 100% for HD Video where as it used to be very small amount for Safari and 30 - 40% for HD.
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Apr 29, 2012
Just want to know if I can shutdown my imac without having to write everytime my admin name and password?
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Jul 4, 2012
My iMac keeps shutting down in after about an hour in sleep mode. I have to press the power button to turn back on. Energy saver settings are still default settings. I'm running osx 10.7.4.Â
Info:
iMac (21.5-inch Mid 2011), Mac OS X (10.7.4)
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Dec 4, 2014
Recently my 27" iMac keeps shutting down after 15 or 20 min use. It's very irritating and it's take awhile to restart again. Â
Info:
iMac, iOS 8.1.1
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Feb 10, 2012
Off-late almost everytime I am getting kernal panics when I shut down my iMac 21 2011 model. After booting back here is the problem report that comes up. I could'nt make head or tail of it, could anybody help me out here. Â
Interval Since Last Panic Report: 591345 sec
Panics Since Last Report: 9
Anonymous UUID: 3C133529-E586-47C7-8799-ACB548B7537AÂ Â
Sat Feb 11 11:11:39 2012
panic(cpu 1 caller 0xffffff80002c266d): Kernel trap at 0xffffff7f820f0ff8, type 14=page fault, registers:
[code]...
Info:
iMac, Mac OS X (10.7.1)
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May 13, 2012
Lately my iMac monitor keeps shutting off every couple of minutes. It seems like its in sleep mode but if i move the mouse or press a button on the key board it doesn't go back on. I have to press the power button 2 times to get it to turn back on. When the monitor turns on everything is still there right before it shut off.
Info:iMac, Mac OS X (10.6)
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Jun 8, 2012
I have had my mac for only 1 year and still getting use to the troubleshooting. My Imac keeps getting stucking on spinning circle when I shut down or reboot. I have unplugged all my external hard drives and printer. Nothing seemed to work. Mac OS X Lion 10.7.4 (11E53), 4gb Ram, Processor 2.5 GHz Intel Core i5.
Info:
iMac (21.5-inch Mid 2011), Mac OS X (10.7.4)
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Aug 30, 2014
I have had this for the last few days, so I don't really know what's going on...Â
Anonymous UUID:Â Â Â Â Â Â D4B5793A-92CF-4E5D-33F8-94D77B084C5CÂ Â
Sun Aug 31 00:07:39 2014
panic(cpu 2 caller 0xffffff8002c5220d): "zalloc: zone map exhausted while allocating from zone kalloc.8192, likely due to memory leak in zone kalloc.64 (1440851328 total bytes, 22513266 elements allocated)"@/SourceCache/xnu/xnu-2422.100.13/osfmk/kern/zalloc.c:2494
Backtrace (CPU 2), Frame : Return Address
0xffffff81348c3c70 : 0xffffff8002c22fa9
[Code].....
Info:
iMac, OS X Mavericks (10.9.3)
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Aug 26, 2014
My 2007 iMac keeps shutting off randomly. I'm running Mountain Lion. I have tried unplugging it from the back waiting and plugging it back in. Sometimes when I have turned it back on, the fan will run loudly.
2GHz Intel Core 2 Duo
4GB Ram
OS X 10.8.5
Info:
iMac, Mac OS X (10.5.1)
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Jul 2, 2009
all of a sudden today my computer shuts off. It's when I leave, I come back and it's off. I have no idea what is wrong and NO clue how to trouble shoot this!
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Sep 11, 2009
i stupidly got my mac mini wet. water ran underneath it. now it seems that every time the mac heats up too much it shuts down. how can i fix this?
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Aug 25, 2009
I have a fairly new Mac about 1.5 years old. Recently I am having an issue with it shutting down periodicly for no apparent reason and then it starts back up> I have noticed it does do this by bumping the desk or hitting the screen but it is only every so often and can't duplicate it by trying these things.
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Aug 30, 2010
I use Daylite and Daylite Server on my MBP connected to the net and sync my iPad running Daylite Touch through my 3G connection. It works great while I have my MBP running. I want to set up my MBP so that it will run without shutting down (screen blanked out). I just want to do this for a few days to see how it works out. If I like it I will get a Mac Mini to run as the server instead of the MBP.
The problem I am having is that no matter how I adjust the settings on the MBP, after awhile it shuts down Daylite and Daylite Server. Daylite Server shuts down and puts out an error message and everything just hangs there. I figure I must be doing something wrong in the settings but don't know what. I tried searching the forums, google, apple support, etc. but haven't found anything - of course I am probably searching all those wrong too.
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Dec 23, 2008
About 10-15mins after starting a WoW session in 10.5.6 on a Mac Pro, the screen goes into powersave mode, and cannot be returned. This is leaving me with no alternative but to hard reboot!
I can hear the fans going mad as I'm playing, so wonder if it's a heat issue. If so, what to do about it?
Can anyone suggest:
a) How to break out of screen power save without hard rebooting?
b) What the issue may be and how to investigate/resolve it?
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Feb 13, 2009
My mac os x 10.5.6, (2.8 Ghz Intel Core Duo, 2GB 800MHz DDR2 SDRAM) keeps shutting itself down spontaneously - no error message occurs before or after it shuts down, and when i press the power button on my mac i get no response.
I have to turn it off at the power point and turn it on again.
I have a power surge board and only my mac is plugged into it so i'm pretty sure it's not a surge problem.
It seems to mainly happen when the screen saver comes on, and i have checked all of my system preferences and i havn't selected to turn off hard disk's at any time etc. I have no idea why it's doing any of this!
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Mar 5, 2012
When im playing a game in bootcamp, my computer just randomly turns off. I thought it might be from overheating, but I started using a cooling pad to try and help, and it shut down almost right away the next time I went to play. It happens occasionally when im running osx, but not nearly as often.
Info:MacBookPro, Mac OS X (10.6.7)
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Apr 9, 2012
After I bought it, I noticed that the fan was making loud noises when I used it too long. I know it is normal for it to overheat after a long period of use but it doesn't just overheat, the fan starts making a weird grinding noise. I thought that it was just dirty and it wasn't affecting the way my computer was running, so I just ignored it.
It has been almost a year now since I first bought it used and the fan has gotten a lot quieter, but just starting last week I was watching a movie on Netflix and right in the middle of my movie, the computer just randomly shut off. I figured it was overheating. But, even after it had cooled down, I went back to watching my movie and within 10-15 minutes, it did it again!
Info:MacBook, Mac OS X (10.5.8)
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Jun 20, 2012
When I woke up this morning, I went to use my new Mac Mini. For some reason, it will appear on the monitor for about five seconds, and then nothing will show on the monitor at all. Attempting to restart the Mac Mini only finds it doing the same thing.
Info:
Mac mini, Brand New! Mountain Lion
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Jul 1, 2012
Recently a email link was clicked on and since then my wife has been having issues with her G5 shutting down. Sometimes the box will not completely boot at all and others it will boot up for a moment and then shut itself off.
I have looked for teh Flashback Trojan and appear to be clean. If i boot the box in safe mode when booted in safe mode all seems okay. I have also recently reset the PRAM and have had the machine up for a few minutes and it has not shut down yet.
Info:iMac, Mac OS X (10.5.8)
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Sep 21, 2010
Having successfully installed Windows XP via Boot Camp on my new iMac and with everything up & running I am wondering what is really best for my iMac? From what I understand, when using OSX, you should never keep shutting it down all the time (unless you're going to be away from it for a while). It's best to put your Mac to sleep each night and restart the machine once a week. So what about Windows?
Having used a PC all my life, I'm very used to just shutting the computer down everytime when I have finished what I've needed to do and booting it back up when required. I'm going to be using Windows extensively for the next year on the Mac, so should I put it on Stand-by or Hibernate each time I'm finished? Or is it safe to keep shutting it down? (Note: I have the SSD + HDD option installed. I assume if I keep shutting it down, the performance of the SSD will degrade far quicker?)
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Nov 6, 2010
Is there a simple way to shut off the computer at a specific time?
It seems like an easy thing to do that shouldn't require writing a fancy script.
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