Intel Mac :: Why Is Computer Shutting Down
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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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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Apr 7, 2010
For the last few months, my MP has had a strange quirk. When I select Shutdown, the computer restarts instead. Then, at the login screen, I select shutdown and it will then turn off. I've tried disconnecting all USB and Firewire connections (except keyboard and mouse) with the same results. It does seem to be time related. For example, if I start up the computer, get to the desktop and then shutdown, it turns off no problem. However, after its been running for a bit it will do the restart thing instead.
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May 22, 2012
My computer keeps shutting off when I move it and I have issues with my charger.Â
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May 23, 2012
I have a late 2006 MacBookPro, OSX10.5.8 . The machine will run fine on battrey power to a bout %50 or %60 and then just completely shut down. No going down to %20 or %30 and a warning etc ... This has only started happening in the last month or so. The battery is about a year and a half old, 198 cycles and shows about 3200mAh at full charge. I do understand the batteries in these things are only good for a bout 300 cycles. What I don't get is th lack of warning of any kind.
Info:
MacBook Pro, Mac OS X (10.5.8)
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Dec 16, 2009
I don't know if this has been discussed here but all of a sudden my iMac, running Snow Leopard, 10.6.1) keeps waking up all on it's own. I believe this started after the latest update of Java and Super drive firmware (I believe these were the latest updates).
Is there anything I can do short of shutting the computer down.
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Mar 4, 2012
Its always plugged in and sometimes when I close it and come back to open it, it won;t turn in and I have to push the power button off and on again!
Info:
MacBook Pro
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Mar 13, 2012
I just replaced my battery and now my computer shuts down randomly no matter how much battery power I have. Most recently it shut down with over 70% battery life. I followed the instructions on the new battery, but I can't figure out what is causing this type of issue based on my settings that didn't change from the original battery.
Info:
MacBook Pro, Mac OS X (10.6.8)
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Nov 13, 2010
You can automatically shut down or start up your mac at anytime you like.
simply go to energy saver preferences>and click schedule
Why my mac can't do so? Any ideas?I did set the day and time but it seems nothing did happen. What did I do wrong?
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Jan 29, 2010
I have a Macbook pro 2.4Ghz Intel Core 2 Duo witch i bought before 1 year before 3 days it started to doing this problem: i choose shut down and instead of that it restarts. I did the command option P R thing to reset but didnt work also does that when im going to safe mode. i also try to clean install my operating system but still nothing happens the problem is there i did also a hardware test and everything is ok verify disk : ok permissions ok: i dont know what else to do?
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Nov 1, 2009
I have a ibook G4 that's been randomly shutting down. It started doing this maybe about a month ago but it's started getting really bad lately. At first it would shut down if I unplugged the adapter. Not every time I unplugged it, but probably about 50% of the time. When I press the battery button all of the green lights would light up. About half of the time it will start up again if I just hit the power button but the half of the time I have to reset the pRAM. Lately this same thing has been happening except when the computer is still plugged in. And when in say shutting down I mean essentially instantaneously. One second it's on and then the screen goes black and it makes that turning off noise. Not a chime, but like all the fans and hardware are coming to a stop.
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May 31, 2008
I recently installed Leopard. On my way to bed I saw that there was an update to be installed. I clicked install, but the install took to long (and was being executed in a special screen after the shut down of the computer, so there were no annulation options) and I was so annoyed with the length of the installation that I shut my computer down. A big no, so it seems, because the next morning when I booted my computer, the login screen appeared. I set up-auto login, so seeing a login window was strange. When I entered my correct password, I first saw a blue screen and then returned to the log-in screen. There appears to be no way for me to log-in.
Things I've tried: safe boot, booting with the install DVD (I checked the harddrive for any problems, there were none) and booting while pressing an interesting variety of keys. With the same result: none. I tried doing the root-user thing, but to no avail. I think I don't have root user selected in finder. The updated I tried to install was the last one seeded by apple, I think it was the 10.5.3 update; there were three files to be installed. My computer is and intel iMac from the first quarter of 2007.
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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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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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Apr 19, 2012
My computer keeps stalling and rotating beachball won't allow me to move forwards or backwards. Ultimately I need to turn off the power. I have tried resetting the PRAM and SMC but neither seems to help for too long.Â
Info:
iMac, Mac OS X (10.4.11)
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