IMac :: Randomly Shuts Down - Instantly Reboots Itself

Nov 16, 2010

I do not have AppleCare on this machine. I've got a 27" iMac that will randomly shut down, be it in the middle of playing music on iTunes, while I'm typing a document or while the machine is simply in screensaver mode doing nothing. Usually the machine tries to instantly reboot itself. All too often, it cannot be rebooted and I have to let sit for quite sometime before it will even power back on. Lately the problem has gotten worse, almost never reboots by itself.

Finally, in the last few days, it just won't turn back on. Nothing. My biggest concern is that I have an unreleased music album from an instantly recognizable major client on the iMac's hard drive, not due out for many more months and still unannounced. I can't simply take the computer into an Apple store for troubleshooting as those files are worth and could cost me exponentially more than even a new iMac outright ever would.

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IMac :: Reboots And Never Shuts Down?

Jul 9, 2010

I recently updated to snow and since then have had problems turning off mac. I've reset pram, tried unplugging externals, tried logging out, then shutting down, but every time I hit apple-shutdown it goes black, and reboots. I can put it the screen to sleep with hot corners, but never turns off unless I manually hold down power.

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Oct 31, 2007

My new Alu iMac just randomly shuts off. It's happened like 5 times (once while I was typing a paper). I have updated to 10.5, and it has happened twice since the install.

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IMac PPC :: G3 Randomly Shuts Off

Feb 12, 2012

I have an old iMac G3 (400mhz slot loading) that I got second hand for free. When I first got it, it seemed to work perfectly in every way, but the hard disk wasn't very big so I tried to install a new (larger) one. Everything seemed to go fine, but after the upgrade, the computer would only stay powered on for about 10 minutes before shutting itself off. I assumed that it was a problem with the hard disk, so I put the old one back, but the problem persisted. It will only stay powered on for a maximum of about 20 minutes before blinking off and then it has to sit for a while before I can get another 20 miutes out of it

Info:iMac, Mac OS X (10.1.x)

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PowerPC :: Ibook Instantly Shuts Off While Battery 60%

Oct 27, 2007

I recently purchased an iBook used from someone locally. I got a good price because he said the battery was weak. However, I want to make sure that's actually the case. The power cord connection is not loose.

Coconutbattery says my battery is 36% health, but it also says it's not plugged into the charger when it actually is, so I don't know how reliable this program is. It says my mac is 27 months old, i have 367 cycles on the battery... etc. And I am running Tiger.

The problem is that the power meter on the top bar will say i've got a full charge... so I run the computer (on battery) down to about 60% according to the meter, but the computer instantly shuts off. I try to reboot, and it shuts off while rebooting. It's like the battery works fine and suddenly dies. I get about 30-40 minutes use out of the battery.

Is this the battery or do I have other problems? This only happens when using the battery.

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Mac OS X Lion Server :: Now Reboots Randomly After 10.7.4 Upgrade

May 14, 2012

I have been running a Mac Mini OS X Server for last 3 months without a single error. I have 2 of them.Yesterday, I upgraded to 10.7.4 (from 10.7.3) and today, one of my servers has crashed twice. Both times, it has rebooted (no Monitor attached to Mac Mini). It is out of service for 10 mins or so. This concerns me, as it never rebooted before 10.7.4. Also, other Mac Mini OS X Server doesn't have an issue.I usually wait a few weeks before installing software updates on servers - but I decided to yesterday (Sunday), because I had some time, stupid me.

Info:
iMac, MacBook Air, iPad, iPhone, Mac OS X (10.7.2), Apple customer since 1982

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MacBook :: Reboots Randomly In The Middle Of Watching Videos?

Dec 7, 2009

I have an old macbook and it has ha no problems up until now. I just hooked it up to an HDTV through its mini-DVI port to hdmi. Now I have random reboots in the middle of watching videos. Is this common? Is there any way to fix it?

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OS X V10.7 Lion :: 2012 Macbook Pro Crashes And Reboots Randomly?

Jun 21, 2012

I just bought my new 2012 macbook pro a couple weeks ago, and so far it has crashed and rebooted by itself four times. Three of those four times, I had only been running  a couple programs, such as Chrome and Mail, while all others were closed. the entire computer will freeze for about 6-7 seconds (no response to mouse movement/keyboard) and then shut down and reboot.  

Is this a bug with OS X Lion? or the new macbook Pro? or my macbook pro specifically indicating there's some sort of defect?

Info:
MacBook Pro (13-inch, Mid 2012), Mac OS X (10.7.3)

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MacBook Pro :: It Randomly Shuts Down

Apr 3, 2012

My 13" Macbook Pro is forcing me to shutdown and restart my computer at random times. So far I've only noticed this when I'm on Safari.

Info:MacBookPro, Mac OS X (10.5.8)

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Safari Randomly Shuts Down

Jun 26, 2012

Safari randomly shuts down while in the middle of browsing. The rainbow loading icon will appear and then all windows and tabs will close. Then it gives me the option to report or ignore the problem. This happens at least once every day. Also, Software Update does not load. It just says "The Software Update Server (appleupdate.iu.edu) is not responding."

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MacBook Pro :: 13'' Mid 2010 Shuts Down Randomly?

Mar 26, 2012

I have my macbook pro with 2.66GHZ, 320GB, 4GB RAM..It  runs properly however it shuts down randomly. Sometimes after one hour other times after just a few minutes. Am wondering what the problem could be. I have done all teh PRAM resets. Thought it was the fan but the fan runs normally.

Info:
MacBook Pro, Mac OS X (10.6.8)

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MacBook Pro :: Computer Randomly Shuts Off?

May 28, 2012

My 2 year old MacBook Pro randomly shuts off at inconsistent intervals (any where from 15 mins to a few hours) its been going on for about a day.

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MacBook Pro

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MacBook Pro Screen Randomly Shuts Off

Jun 18, 2012

My MacBook Pro screen randomly goes black, yet the laptop still has power. I usually have to reboot in order to get back into the computer.. as moving the track pad doesn't bring the screen up.

Info:
MacBook Pro, iOS 5.1.1

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MacBook Pro :: 15" Randomly Shuts Off?

Jul 4, 2012

15" MacBook Pro, 2.66Ghz i7, 8GB RAM running 10.7.4 Randomly shuts off... and it's becoming more and more frequent.  I don't know if these reports help.... but I have to be able to use this thing! 

Interval Since Last Panic Report:  222415 secPanics Since Last Report:          4Anonymous UUID:                    13D61FDA-4D08-401B-9CA5-1FD9FD5D86C8 Wed Jul  4 08:01:50 2012panic(cpu 0 caller 0xffffff7f809f2947): NVRM[0/1:0:0]: Read Error 0x0061021c: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff8113d6f000 0x0a5480a2, D0, P2/4Backtrace (CPU 0), Frame : Return

[code]....

Info:
MacBook Pro (15-inch Core 2 Duo), Mac OS X (10.7.4)

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Jun 29, 2014

MacBook Air randomly shuts down whether plugged in or on battery power but not when hooked up to a monitor and using bluetooth keyboard and mouse. Battery fully powered.

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MacBook :: It Shuts Off Randomly When Its Connected To Charger

Feb 25, 2012

Lately i have been noticing that my macbook will not stay charged for very long even when it is fully charged. And the most irritating thing is that when it is charging and i am using it, it will randomly shut off.

Info:MacBook, Mac OS X (10.5.8)

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MacBook Pro :: Randomly Shuts Down Now With Red Battery Indicator At 52%

Dec 4, 2014

For the past few days, my mid 2012 15" rMBP has been powering down or sleeping while in the middle of performing tasks, and more importantly when it's ABOVE 15% charge. Just today however, I now have a red battery indication at 52% and holding.

At the time, I had an external monitor plugged into the thunderbolt port closest to the ac adaptor port. I was running Adobe Lightroom and Photoshop, but nothing else, and was not connected to the internet. I had turned wifi off. My problems continued until I plugged in. Once on a full charge, I unplugged and the same thing happened all over. Numerous times. So, I disconnected the external monitor, and thought that solved my problem. The next time I used the computer, I put the external monitor into the other TB port and did not have any issues, however I wasn't using the rMBP as extensively. 

Today, again while performing tasks such as importing/exporting images with LR & PS, my laptop shut itself down. It runs warm, and fans are purring like crazy, but that's normal for the work I'm doing. Prior to the shut down, the battery read ~24%. I plugged in and woke it up. No external monitor is attached today. I am not running any other programs besides Chrome at the moment. I noticed a red battery light at 52% and it has not changed. Option clicking the indicator shows a "normal" condition. 

OS 10.8.5
2.6 ghz intel i7
16 GB 1600 MHz DDR3
250 GB SSD (with ~25GB free)
NVIDIA GeForce GT 650M 1024 MB

I have had a Speck hard shell case covering the laptop for a few weeks, but no issues until this week.I am a pro photographer who shoots tethered on location and carries my rMBP around on assignment. It has never been dropped, or damaged in any way.

This is my current system info:

Battery Information: Model Information:  Serial Number:   Manufacturer:   Device Name:  Pack Lot Code: 0  PCB Lot Code: 0  Firmware Version: 511  Hardware Revision: 000a  Cell Revision: 1150  Charge Information:  Charge Remaining (mAh): 3455  Fully Charged: No  Charging: No  Full Charge Capacity (mAh): 7431  Health Information:  Cycle Count: 533 

[Code] .....

Info:
MacBook Pro with Retina display, OS X Mountain Lion (10.8.5)

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MacBook :: Randomly Shuts Off While On Battery Power

Jun 25, 2014

I have a 13-inch Macbook, Late 2008 model, using iOS Mavericks. While on battery power, the laptop will randomly just turn completely off, despite still having plenty of battery power left. I know it's not a calibration issue where the battery is dead but appears to have charge left, since I'm able to turn the computer back on again and continue using it. 

Battery info:Charge Information:  Charge Remaining (mAh): 606  Fully Charged: No  Charging: No  Full Charge Capacity (mAh): 2609  Health Information:  Cycle Count: 157  Condition: Service Battery  Battery Installed: Yes  Amperage (mA): -1265  Voltage (mV): 10855 

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MacBook Pro Randomly Shuts Down Even After Hard Drive Replacement

May 26, 2012

I have a mid 2010 MacBook Pro that has been shutting down randomly for quite a while now. It seems to happen most when I have more than one application running but sometimes happens with nothing running at all. It seems that the screen goes off and the sound skips but the keyboard light is still on. I thought it was because I had a bad hard drive but I replaced it and it still randomly shuts down. I ran smart utility and it all passed. I just don't understand what can be causing this? I take this computer to school all the time and it's kind of embarrassing having this shut down on me mid-presentation.

Info:
MacBook Pro, Mac OS X (10.7.4)

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Jun 24, 2014

My MacBook Pro 2010 15 inch screen shuts off randomly. The whole laptop doesn't shut off just the screen. It calls it a panic but I have to hold down the power button to shut it off when this happens or it will stay on the black screen.

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MacBook Pro :: Randomly Shuts Off; Beeping Noise; Burning Smell?

Apr 18, 2012

I dropped my MacBook by accident earlier today and circa three hours later I am experiencing problems I have never encountered before. Now, my MacBook shuts off every 15 minutes or so and the last time it shut off, the screen went completely dark and the computer began making a regular beeping noise, and it smelt like something was being burnt... Lately I have also been noticing that when charging the charger tends to get heated up easier than before, and to higher temperatures as well.

Info:
MacBook Pro, Mac OS X (10.6.7)

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IMac Intel :: System Instantly Shut Down / Not Delivering Power To USB Devices

Oct 31, 2007

Just recently (this night,) whenever I would unplug my main USB hub, my iMac (Late 2006) would turn off (that is, instantly shut down as if the power had been disconnected). I don't know why this happened, but it turned on immediately afterward so I shrugged it off. The last time this happened, (the 4th time,) the iMac wouldn't turn back on at all.

It responds to power button presses, and you can hear the harddrive spinning up and the CD drive whirring and fans spinning. The sleep light in front stays on, but the display stays black, and it doesn't make the characteristic chime when it "turns on". In addition, it doesn't seem to be delivering power to USB devices, so there's no way that I can boot up from a startup disc or anything to see what's going on.

What do you guys think could be wrong with my computer? I doubt my non-existant applecare would cover anything of this sort, and I'm pretty sure that i'm SOL for hopes of a computer that just works. In addition, one other question. I was working on a VERY important school assignment at the time, (cliche, I know,) so is there any way I can connect another computer to my iMac so I can get my school assignment off of it?

Information:
G5 Intel iMac (Late 2006)
Mac OS X (10.6.4)

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IMac :: Shuts Down By Itself?

Apr 10, 2010

My iMac (21.5") turn off by itself and it doesn't turn on until I unplug the AC from the back and let it rest for at least half hour!!! If I try to turn it on I only get fan and drive noise but no screen at all... The longest time I let it rest, the more time that I can use it. I already reset PRAM. I'm runing 10.6.3 and the biggest software I use is ArchiCAD 13...

Does anybody have a similar issue with his/her iMac?

PS. Sorry, I don't speak/write good English but I did my best...

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Desktops :: G5 ISight IMac Shuts Itself Down (OS 10.5.8)

Apr 19, 2010

Have a 17" G5 iMac iSight (OS 10.5.8) that works normally for several hours and then the CPU temperature suddenly spikes and the computer shuts itself down. When I check the Temperature Monitor (application) history graph, it shows normal temperatures and then a spike. There are 3 fans and I don't know which is failing or whether there's something in the temperature sensing that's gone haywire. My only solution is to do a forced restart. By this time, things have cooled and it will work for several hours.

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PowerPC :: IMac G3 Shuts Down During Boot

Dec 25, 2008

I have a 700MHz iMac G3, which froze during DVD playback and it needed to be rebooted. Now it will not boot, the gray screen comes up with the loading circle, but it will just shut down after about a minute. I have reset the PRAM, PMU and it is running 10.4. No beeps or anything when it shuts down, it just turns off.

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IMac :: Shuts Off Immediately After Powerup?

Jun 1, 2009

Sometimes when I turn my iMac on, it'll start doing its thing�light comes on, chime goes, fan whirrs, but then it'll make a strange click/"werrrrh" noise and turn off.It's happened twice to me since I've brought it home from school and each time I just tilted the monitor around while turning it on and it worked.I have been avoiding turning off / restarting my computer because I'm afraid its going to happen and I won't be able to get past it.Could the powersupply be loose or something?

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IMac :: No Warning - Just Shuts Off - Overheating?

Sep 14, 2009

I've been having trouble with my new iMac that i purchased recently (26th of August actually). Whenever I'm doing something CPU intensive, the machine just shuts off, but usually it's not right in the middle of whatever I'm doing, it's after I close the application. For example: I was playing SimCity4 the other day, pretty old game to cause this problem I would think. As soon as I exit the game, the system shuts off. No warning, nothing, just shuts off. This will happen when i close VMs (it actually happened yesterday while I was running the VM), etc. So I've reset the SMC/PMU, PRAM/NVRAM, and I've even reseated the RAM. Still the same problem. I've taken it in to a repair center in town, hoping I'll get it back by the end of the week. Does anyone have any idea why this would be happening?

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Software :: IMac Shuts Down At Start Up

Feb 1, 2009

This has been a great computer - bought new in 2004. Recently started to click "off" as it was just powering up. I thought there was a bug - so did a clean and install for OS X - but still does it. The only way to start computer is to hold the Options & Alt key and P and R key at start up until I hear 6 dinging noises of start up (why six is the magic number I don't know. But it is the only combo that works!). Once it is up and running no problems.

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IMac PPC :: G4 Starts Up Then Suddenly Shuts Down?

Apr 23, 2012

I have an old g4 , the kind shaped like half a golf ball, which starts up and then quits at different places during the process. Sometimes with the gray screen and Apple logo, sometime later when the OS has fully installed,but fails quite rapidly after that. Then tries to reboot itself with varying degrees of failure.

Info:
mac g4, Mac OS X (10.4.9)

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PowerPC :: IMac G5 Shuts Down During Sleep Mode

Nov 30, 2006

My iMac G5 (rev A) shuts down immediately after i put it to sleep mode after just starting up the computer. The longer the computer has been on before I put it to sleep, the longer it takes for the computer to shut down while in sleep mode. I already did the hardware test and it said there were no problems.

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