MBA 11' - Sudden reboot / Crash

Good day
It is a few months now that my MBA 11' every now and then crashes or rather i should say suddenly reboots, as the screen goes blue and the system reboots as if nothing had happened (no data recovered, no software running etc).
No specific software seems to be blamed, as this has happened when i was just browsing the internet (with no whatsoever multitasking) or playing a videogame or just using itunes.
Any ideas about the possible reason for that ?
Thanks in advance !

Start up in Safe Mode.
http://support.apple.com/kb/PH14204?viewlocale=en_US
If this does not help, contact Apple.
Genius Bar reservation
http://www.apple.com/retail/geniusbar/
Best.

Similar Messages

Sudden system crashes for Mac mini 2011

I just came home from a 2-week vacation and my computer has begun to crash and reboot, seemingly when I need the computer to do some task more intensive than Internet browsing.
It started when I tried uploading pictures into iPhoto via my camera's SD card--and it invariably happens whenever I try this--but it has also crashed and rebooted during simple multitasking procedures, like clicking to check my download progress in Safari as my iPhone is syncing in iTunes. Yesterday I had to contend with the white (grey?) screen of death for a few hours as I tried different methods. Fiddling around in Safe Mode let me fix that problem, at least, but the sudden system crashes still persist.
Could my computer have been affected by a lack of use over the last two weeks in the summer heat? It's been hot in the house, but not exceptionally so for August. And before I left I shut it down and unplugged the power cord.
Here are the first several dozen lines of the error report from the most recent crash. If anyone could offer me some help, I'd be very grateful.
Interval Since Last Panic Report: 72 sec
Panics Since Last Report:          2
Anonymous UUID:                    5966B3C8-D237-441F-B085-67433211CA95
Thu Aug 30 22:31:31 2012
panic(cpu 0 caller 0xffffff800d7733f2): assertion failed: MBUF_IS_COMPOSITE(m), file: /SourceCache/xnu/xnu-2050.9.2/bsd/kern/uipc_mbuf.c, line: 4003
Backtrace (CPU 0), Frame : Return Address
0xffffff80f52f3c20 : 0xffffff800d41d5f6
0xffffff80f52f3c90 : 0xffffff800d7733f2
0xffffff80f52f3ca0 : 0xffffff800d78d2f8
0xffffff80f52f3d60 : 0xffffff800d77075f
0xffffff80f52f3d90 : 0xffffff7f8e264d2e
0xffffff80f52f3dd0 : 0xffffff7f8e280d7b
0xffffff80f52f3e30 : 0xffffff7f8e2f79d4
0xffffff80f52f3ec0 : 0xffffff7f8e26b62f
0xffffff80f52f3ef0 : 0xffffff800d847078
0xffffff80f52f3f30 : 0xffffff800d845b8a
0xffffff80f52f3f80 : 0xffffff800d845cb9
0xffffff80f52f3fb0 : 0xffffff800d4b2677
      Kernel Extensions in backtrace:
         com.apple.driver.AirPort.Brcm4331(601.15.21)[2D12C2AA-EED3-3C72-8A75-FFF39E64DA AC]@0xffffff7f8e25e000->0xffffff7f8e44ffff
            dependency: com.apple.iokit.IOPCIFamily(2.7)[8C9E06A4-13D0-33F5-A377-9E36F0ECC229]@0xffffff 7f8da4d000
            dependency: com.apple.iokit.IO80211Family(500.15)[3CA3EBF7-D5C1-3819-9346-BE648FC7644E]@0xf fffff7f8e1f2000
            dependency: com.apple.iokit.IONetworkingFamily(3.0)[4DB5B398-8957-33F6-9EC1-0D45D80769DD]@0 xffffff7f8db8f000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
12B19
Kernel version:
Darwin Kernel Version 12.1.0: Tue Aug 14 13:29:55 PDT 2012; root:xnu-2050.9.2~1/RELEASE_X86_64
Kernel UUID: 3005059E-270B-3B9F-940D-7A66C05DDC9D
Kernel slide:     0x000000000d200000
Kernel text base: 0xffffff800d400000
System model name: Macmini5,1 (Mac-8ED6AF5B48C039E1)
System uptime in nanoseconds: 2262319547463
last loaded kext at 432629451752: com.apple.driver.AppleUSBCDC          4.1.22 (addr 0xffffff7f8efac000, size 16384)
last unloaded kext at 543566806951: com.apple.driver.AppleUSBCDC          4.1.22 (addr 0xffffff7f8efac000, size 12288)
loaded kexts:
com.zeobit.kext.Firewall          2.3
com.apple.filesystems.msdosfs          1.8
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.driver.AppleBluetoothMultitouch          75.15
com.apple.driver.AudioAUUC          1.60
com.apple.driver.AGPM          100.12.69
com.apple.driver.ApplePlatformEnabler          2.0.5d4
com.apple.iokit.IOBluetoothSerialManager          4.0.9f8
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleHDA          2.3.0f2
com.apple.driver.AppleMikeyDriver          2.3.0f2
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f8
com.apple.driver.AppleSMCPDRC          1.0.0
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.2.6
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.driver.AppleLPC          1.6.0
com.apple.driver.AppleIntelHD3000Graphics          8.0.0
com.apple.driver.AppleIntelSNBGraphicsFB          8.0.0
com.apple.driver.AppleIRController          320.15
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1

Remove the "MacKeeper" crapware as follows, then reboot and test. If there's no improvement, post again.
Note: These instructions apply to the version of the product that I downloaded and tested in early 2012. I can't be sure that they apply to other versions, nor do I intend to repeat the test.
IMPORTANT: "MacKeeper" has what the developer calls an “encryption” feature. In my tests, I didn't try to verify what this feature really does. If you used it to “encrypt” any of your files, “decrypt” them before you uninstall, or (preferably) restore the files from backups made before they were “encrypted.” As the developer is not trustworthy, you should assume that the "decrypted" files are corrupt unless proven otherwise.
In the Finder, select Go ▹ Applications from the menu bar, or press the key combination shift-command-A. The "MacKeeper" application is in the folder that opens. Quit it if it's running, then drag it to the Trash. A dialog will pop up asking why you want to uninstall it. You don't have to provide that information. Enter anything you like in the text box, then click the Uninstall button. All the functional components of the software will be deleted. That's the only useful feature of "MacKeeper:" it deletes itself. Reboot.
Do not try to uninstall by dragging the MacKeeper icon in the Dock or the LaunchPad to the Trash.
Here are some general suggestions. If you want your computer to be usable, don't install crapware, such as “themes,” "haxies," “add-ons,” “toolbars,” “enhancers," “optimizers,” “accelerators,” “extenders,” “cleaners,” “defragmenters,” “firewalls,” "barriers," “guardians,” “defenders,” “protectors,” most “plugins,” commercial "virus scanners,” "disk tools," or "utilities." With very few exceptions, this kind of material is useless, or worse than useless.
The more actively promoted the product, the more likely it is to be garbage. The most extreme example is the “MacKeeper” scam.
The only software you should install is that which directly enables you to do the things you use a computer for — such as creating, communicating, and playing — and does not modify the way other software works. Never install any third-party software unless you know how to uninstall it.

Sudden Reboot in 10.6

Ok there people,
I have had the strangest thing happen after I "upgraded" to 10.6. It has happened a couple of times now and I was wondering if anybody has had the same issue I have.
I start up Quicktime 10 I start to play a movie it runs for maybe 2 to 10 seconds then I press cmd -f for full screen and Boom instant reboot. Screen turns black and well you no how a reboot goes.
I can't seem to find a common ground for this issue other than the fact that I'm trying to get a movie to play full screen. It won't happen for like 30 times but than out of the blue.
I say mystery dear Watson, what do you guys think.
Message was edited by: TPA8580

I'm glad to see I'm not the only one having the same exact problem, I thought my Mac mini had an hardware problem.
I've had two of these "sudden reboot" since upgrading to Snow Leopard, I never had them before. In my case it happened after a mouse click: the screen froze for 2 seconds, then I got a blue screen and a "reboot".
These reboots seem quicker than normal reboots.
Looking at the console, it seems that the reboot occurred because the WindowServer crashed.
9/25/09 2:51:05 AM iTunes[28762] HIToolbox: received notification of WindowServer event port death.
9/25/09 2:51:05 AM com.apple.launchd[1] (com.apple.WindowServer[90]) Job appears to have crashed: Segmentation fault
I did some research about the message "WindowServer event port death" and found that it was linked to sudden reboots that also happened for some users in Leopard (10.5).
Another thing I found is that other users have been experiencing "sudden log-outs" when the WindowServer process crashed. Since I have auto-login on my Mac, I suspect that what we've been experiencing are not "sudden reboots", but rather "sudden log-outs" where the OS suddenly logs out and then automatically logs-in.
I'm running 10.6.1... I hope this is going to be fixed with 10.6.2 because it's extremely annoying.

MacBook Pro Retina 2012 sudden reboots

I have a little problem with my MacBook now (Retina Mid 2012 15"). It sometimes, completely randomly, reboots, that is it stops responding, while looping the audio of about last second and then reboots. It runs on the latest version of OS X Yosemite.
The weird thing is it does not display anything like "Your computer had to restart because of a problem" and the logs do not contain a single clue of what could have caused this problem. It also does not contain any panic logs or anything. Previously it would only happen once a week, now it happen two days in a row. I tried resetting the SMC and the PRAM, but it still continues crashing.

Hello....
a couple hours ago Ive read an article, which was written,that the Macbook Pro Retina from mid 2012 till end of 2014 have a hardware problem concerning ur behavior of ur macbook. Sudden reboots,stop to responding, unable to play videos correctly and symptoms of seeing of blurry pics. Resolution of these problems require to contact apple at the applestore and make an arrangement with them to repair that hardware problem. Of course as a gesture of good will from apple. Im using a macbook pro retina mid 2012 have not these symptoms but at my next stop near an applestore i gonna check the macbook just in case.
Think that is exactly what happened to u and apple gonna fix this.
regard
geronimo

I use the latest Firefox 13.0.1. I'm using Windows 7. After a day I updated my Adobe Flash Player, suddenly it crashed and showed a blue screen. Please help me.

My Firefox version is 13.0.1. I'm using Windows 7. Adobe Flash Player version is 11.3.300.265. A few minutes after opened the Firefox, suddenly it crashed and a blue screen showed up, it says there are unexpected error occured and forced my computer to be stopped. I need to restart the computer to see either it still show the blue screen or it just fine. After restarted, I use the Firefox once again, but this time, after about 30 minutes, it crashed again. The same blue screen showed up. As I expected, the new Adobe Flash Update crashes with the Firefox 13.0.1. Really need a solution here. Thank you.

Hi,
Blue screens usually indicate Windows system level problems involving device drivers like graphics card drivers, hardware errors (RAM, hard drive) etc. Malware may also cause this. Searching for the displayed error code would usually provide helpful pointers. The [http://answers.microsoft.com/en-us Windows forum] would also be helpful.

5800 XM Suddenly Reboots

Hello !
i've got grey (not blue or red) 5800 bought in april 2009.
Curently it has firmware 21.0.025 (when i've got this phone it has ver.20) updated through Nokia Software Update.
So there is one annoying problem. About one time a day, or may be in 2 days phone suddenly reboots when some action
occurs.
For example:
- when i recieve SMS, not just recieve - when i'm pressing button "Show" (or whatever it named)
- when i'm using GPS software and go to player (remember that 1 time)
- or like today even when i was reading a book and screen was auto rotated when im turn the phone
- or some other action i cannot remember
Anyway. This stuff never occurs when phone is just lying on a table, even if it playing some music and doing some
other stuff at the same time. It happens when you click something or switch to other app or recieve a call or sms. You need to do some action. And you cannot just try to force this stuff to happen. It will open 10 sms and on 11th it will reboot. It happens by itselfs suddenly (as i say not very often, but 1 time in about 1-2 days).
In 8 times of 10 it will just reboots and will not asking pincode - just nokia wellcome screen and then it goes to desktop. But sometimes it will ask pin.
It was happenning since i've bought the phone. At that time there was not any additional soft installed.
I thought it was bug in firmare but when i've updated to ver.21 thus bug doesn't go away.
so.... does any body knows what is this and what i need to do ???
Solved!
Go to Solution.

Here´s what I recommend you to do:
Backup all your contacts to an online service such as Nokia Ovi.
Update your phone´s FW with NSU
Hard reset your phone by pressing "Green", "Red" and "Camera" button at once during power up of the phone, you´ll perform a hard reset of the phone which will erase all the data.
After that everything should be working fine, if it doesn´t get back to us.
Message Edited by dazz19 on 01-Aug-2009 05:29 AM
By clicking the "Kudos!" or the "Solution?" button on the right you can say "Thank You" and you´ll show the author and others that the post is useful.
The day we stop improving is the day we stop being good.

Dreamweaver cs5.5 suddenly started crashing when it starts or right after it opens...

OMG so frustrating, my dreamweaver cs5.5 has started suddenly started crashing either during the splash screen or right after I choose a web site to work on.
YES I have red the forums and tried EVERYTHING, deleted my preferences, made a new account, re-installed three times, editing the registry, done it ALL. It seems to open now in a temp Guest acct with Admin privileges but I can't access any of my web site files, it's really not usable this way...what can I do?
It crashes during this... even though I have cleared the site cache several times.....
How can I have this expensive of a program just not work.....HELP, I have tons to do and can't use my software!
Please someone help!
I even CALLED Adobe and tried to PAY for help.... this is shocking to me after spending tons of money on Adobe software..
Thank you ahead of time.

Here's exactly what was at the bottom of my bum css file:
/* Extra small devices (phones, less than 768px) */
/* No media query since this is the default in Bootstrap */
/* Small devices (tablets, 768px and up) */
@media (min-width: @screen-sm-min) { ... }
/* Medium devices (desktops, 992px and up) */
@media (min-width: @screen-md-min) { ... }
/* Large devices (large desktops, 1200px and up) */
@media (min-width: @screen-lg-min) { ... }
So they were completely empty...I just stuck them in there because I wanted to add stuff in there...not sure what I will do now..
Interesting just FYI this is a web site which is utilizing Bootstrap...so these MQ came directly from the getbootstrap.com web site...

Distiller will suddenly close/crash the *SECOND* time I open a file for converting to PDF.

The subject heading says it all: Distiller will suddenly close/crash the *SECOND* time I open a file for converting to PDF.
But I think I have a clue why this is happening. Typically, I use Distiller to convert EPS or PS files into PDFs. Also, almost without fail, I embed the required fonts (exclusively Type 1) directly into the EPS/PS files (using the required PFA format) so no local fonts on my computer are needed to be looked for by Distiller to be embedded in the resulting PDF; they're already in the EPS/PS files.
But yesterday, I attempted to convert some EPS/PS files to PDFs using Distiller in which I had NOT embedded the Type 1 fonts (in PFA format, of course) in the source EPS/PS files. The first such conversion would work (in which I select "Open" and choose an EPS/PS file for conversion), but after that initial conversion, the *SECOND* time I clicked on "Open" (open file), Distiller would immediately close/crash.
I then searched the web for answers, and discovered some people were having trouble getting Distiller to initialize if any of their computer system fonts were read-only. So, I went back to my EPS/PS files and embedded the required Type 1 (PFA format) fonts into them, and then—magically—Distiller worked without a hitch: I could open and convert any number of them in succession, with Distiller never closing/crashing.
So, I concluded the reason that Distiller had been crashing upon the second attempted opening of a file (again, simply by pressing the "open" button to search for a file to convert, *not* after selecting a file) must have had something to do with Distiller scanning my computer's installed fonts when there was no embedded PFA font to reference, and a read-only font on my system was causing the problem. However, I looked in the two logical places where my fonts should be located (c:\psfonts and c:\windows\fonts), but found *no* font files' attributes set to "read-only" So, I'm stumped.
I'm using Distiller Pro 10.1.1316 (acrodist.exe) on a Win 8.1 machine. I've found similar posts, going back to 2004, about Distiller immediately crashing after opening when some fonts are read-only; I haven't yet found a post about anyone successfully using Distiller to convert one EPS or PS file to PDF, and then having the program crash when the "Open" button is pressed subsequently. Any clues, anyone?

Never heard about the crash and that does not sound normal. Be sure to do the updates to Acrobat in case that resolves the issue. You might also check the font settings in the settings file and check to ignore the error if the font can not be embedded and Distiller should use what it considers to be the closest system font.

Skype suddenly started crashing - Mac OS X 10.7.5

Skype suddenly started crashing immediately upon launch, I don't even get to see the login screen. I've never had any issues with Skype before and honestly it doesnt make much sense cos I havent even installed anything new latety, all I do is the software updates but haven't had to do any for the last while either.
I've deleted Skype completly and reinstalled but won't work. I've also repaired permissions thinking that would help but didn't either.
Computer specs as follows...
MacBook Pro
15-inch, Mid 2009
2.8 GHz Intel Core 2 Duo
NVIDIA GeForce 9400M 256 MB
Mac OS X Lion 10.7.5
I have the crash report but can't see how to attach it, sorry!
Help please as I use it on a daily basis, completly lost without it
Solved!
Go to Solution.

Hi
Before anything, you can already check if you have installed a third party that does not play well with Skype:
Skype crashing/not starting? Check here
If you have none of these installed, could you please give us some log files? You can check how to do that here:
How to report a crash/hang or any other issue
Thanks!
Thibault
Skype for Mac Engineer
Please do not send me a private message about your crashes: do that in the main forums instead.
If Skype is crashing, please check this thread.
If this doesn't fix your problem, please check how to report a crash/hang, or any other issue

Sudden rebooting becoming a real pain!

Hi
I've been using this board quite happily for a couple of months or so and I like it but just recently, I've been getting sudden reboots for no apparent reason which, once back on the desktop, I'm informed that Windows has recovered from a serious error. I must admit that this is becoming a real pain now and I don't know what's causing it.
A few minutes ago, I just pressed Ctrl+Alt+Del to bring up Task Manager and the computer just restarted for no reason. Every so often, it seems like I just have to hit one key and it reboots
I have read threads in this forum about users who had had similar problems and as far as I am aware, my PSU is up to the job - see system spec and my CPU temp, using stock heatsink with thermal pad is around 44Cat idle. I also have two fans inside the Enermax PSU and another 'exhuast' fan at the back of the case. The DDR voltage is set to 2.70v and the AGP voltage is set to 1.65v. The content of the log file that was created is as follows:
Microsoft Windows
The system has recovered from a serious error
A log file has been created
For more information about this error, click here
The following files will be included in this error report:
C:\WINDOWS\Minidump\Mini112303-01.dmp
C:\~1\David\LOCALS~1\Temp\WER1.tmp.dir00\sysdata.xml
Server=watson.microsoft.com
UI LCID=1033
Flags=123154
Brand=WINDOWS
TitleName=Microsoft Windows
DigPidRegPath=HKLM\Software\Microsoft\Windows NT\CurrentVersion\DigitalProductId
RegSubPath=Microsoft\PCHealth\ErrorReporting\DW
ErrorText=A log of this error has been created.
HeaderText=The system has recovered from a serious error.
Stage2URL=
Stage2URL=/dw/bluetwo.asp?BCCode=a&BCP1=FFB92000&BCP2=00000002&BCP3=00000000&BCP4=8052A4EC&OSVer=5_1_2600&SP=1_0&Product=768_1
DataFiles=C:\WINDOWS\Minidump\Mini112303-01.dmp|C:\DOCUME~1\David\LOCALS~1\Temp\WER1.tmp.dir00\sysdata.xml
ErrorSubPath=blue
There is another file inside the "WER1.tmp/dir00" called "sysdata" which is an XML doc but I can't make any sense of it.
HELP!
Regards

Hi and thanks to all who responded to my post.
Ok, to Danny, I downloaded "Memtest86" and after extraction, I now have an ISO file. When I burn the ISO to CD, does it create a 'bootable' CD with which I boot the computer with it or do I need to actualy create a bootable CD first? Also, what tests need to be run? See last few paragraphs.
MarkA: I looked at the link you provided and I am already running XP Home with SP1 and ALL updates that are available at this time. I have saved the link so i can look at it later regarding the "pagefile". See last few paragraphs.
Gio1: My DDR Ram is in slots 1 & 3 and I may try moving the sticks to 2 & 4. See last few paragraphs.
SoCalMX: My AGP voltage has been at 1.65v since I build the system and I have never had any problems with rebooting until recently (but see my last few paragrahs below), but I will give it a try at 1.60v. BTW, I don't play games on the computer.
To all of you: I forgot to mention that I have been using the board for a couple of months or so and I was very happy with it but around a week ago, I enabled the Promise controller and moved my ATA133 drives from IDE1 to IDE3 and then updated the WinXP Promise S-ATA(378(tm) drivers from v1.00.16 to v1.00.29 and that's when I got my very first error message since I've been using the board, and the message was something like "IRQ less than or not equal to etc, etc, etc".
BTW, the drivers have been rolled back to v1.00.16.
I posted my problems in this forum and after trying a few suggestions from user's, I moved my drivers back to IDE1. I now don't get the IRQ message - at least not since I moved them back but I am getting the error as shown in my first post in this thread.
So, just to clarify, I had absolutely no problems with this board until I moved my ATA133 drives to IDE3 and updated the drivers and that's when the problems started. I have updated my PSU to the one shown in my system 'specs' below.
BTW, the drivers have been rolled back to v1.00.16 but I'm just wondering if the previously updated drivers are still causing problems and I'm thinking of formatting and re-installing XP to see if that will solve the issue?
Regards

My system suddenly reboots, have tried all kinds of stuff.

I have just bought a new system. This is the first time I have built one from scratch. I Got it all together and windows installed. But it will just suddenly reboot for now reason. I went into system properties and sent the system to not reboot when a problem accors. but know I get a blue screen when ever a problem comes up it tells we what to do. Can't really do it. My system is bare. I thought it was the psu. So I went and got another one(430W). Still same thing. I have reformatted the hard drive and reinstalled windows. same thing. I took the MB out to make sure that I didn't leave any stand off's not screwed in. Nothing. I dont know what else it could be. I was thinking about the memory. I'm gonna get some new memory and replace what I have in there now and see if that works.

What is the system ideal temp and what is the temp and full load... Are u sure u have mounted the cooler correctly and used some thermal paste or pad....
Regards
Rasika

E52 is suddenly rebooted.

I have a problem with my E52.
My E52 is suddenly rebooted.
It happens in the following cases.
(1)Arriving a call while charging (often)
(2)Talking while charging (often)
(3)Handing over in packet transmission (sometimes)
Is this an initial malfunction or software bug?

A cell phone today has to be considered (anyway) a sort of "personal assistant", I don't mind price for that and I am not a rich. Such as I don't mind price for my computer (within reasonable).
I am a professional and I am hardly a Macintosh user (a good user not a fanatic one), my dream is something like a Tungsten PalmOS with a Nokia phone inside (everybody must do his job).
I don't know HTC but I guess it comes with Windows Mobile...
I wouldn't change to a BB or iPhone (a gadget more than the phone i need)... probably I am going to be patient for a while, to use my E51, waiting and hoping Nokia will release a new model, small and solid amonf the E5x family.

IPad 2 constantly rebooting/crashing after iOS7 upgrade.

Since I upgraded the iPad2 to iOS7 it keeps on rebooting/crashing every 30s - 2 mins.
I have tried doing a factory reset of the iPad2 to make sure that none of the data/apps on the iPad2 was causing the issue - Same behaviour.
Did a restore of the iPad to version 7.0 as well as 7.0.2 - Same behaviour
Set iPad2 up as a new iPad - Same behaviour
Set iPad2 up and restored from iCloud backup - Same behaviour
Set iPad2 up as new iPad without activating WiFi - Same behaviour
Activated airplane mode - Same behaviour
I currently have an expensive paper weight... Thanks a lot Apple!
Anyone know what I could do to fix the issue?!

Well I'll be,
I tried all the above when this happened to my daughters ipad2 yesterday. For no reason it just started rebooting, no added apps nothing. I tried reset, reboot, restore all everything, tried fresh install all of the above recommendations but nothing worked. Until I saw the last post so I put black tape over the front camera, didn't work, back camera, didn't work, put the tape over both and voila it stopped rebooting, my screen always flashed too before the reboot too in case that means anything, I then ungraded to 7.1 and removed the tape and all good.
I hope this helps someone as I was ready to go to the apple store and pay for a fix.

IMac suddenly reboots

Hi,
Last month I bought a new iMac (27inch i7 processor and 8gb ram), and after an hour or four it suddenly rebooted every ten minutes or so. I brought it back to the official reseller so they would fix it, I got my iMac back and after a few hours it started happening again! So I brought it back again, they said they didn't know what caused the problem and would try to fix it again, they tried replacing to power supply to the hard disk. But this didn't change a thing so I brought it back again.. I asked if they were able to give me a new iMac, they said they were not allowed by Apple.
Anyone experienced the same issues or has a solution?
I changed to Apple as I thought they would offer better quality, turns out I only have problems with it. (sorry for my crappy English, I'm Belgian)
Kind Regards,

Well, when it happens to you, then it is not an extremely uncommon one. I am not a mac novice, far from it having bought macs since day 1, but this is the first time I am facing this spontaneous rebooting.
This does not happen to my other imac which is standing next to this. My take on this is that it has something to do with Snow Leopard. The other imac 24" is still running on leopard. I have done research on this and this problem is fairly common, sometimes running under the thread: spontaneous reboots under Snow Leopard.
What's infuriating is that the reboots just happens very randomly; there are no set pattern. Poofs, the screen goes black and then restarts. I have switched off every startup program that might cause the problem but to no avail.
But currently I might have found the solution. The 27" imac works pretty well for the first few months before the problems started recently. I happened to read one thread that temperature might be the problem. I downloaded Temperature Monitor and found out that the gpu temperatures were touching 70C and cpu temperatures were nearing 60C. So next I downloaded smc fan control and bump up the fan speeds. GPU are now down to 62C and CPU to 48C. So far no reboots. Touch wood.
I sincerely hope that this is the cause of the problems but I will update once I test this out longer. BTW my machines run 24/7 everyday. Others being 2 other minis and a G5 tower. My guess is that dust buildup over time might have exacerbated the heat problem and coupled that with the heat spell we are having at the moment. The reasons why the macs are not affected could be that SL has lower thresholds. I have my Macbook battery died on me right after I installed Snow Leopard but that is another story. My ancient iBook battery is still running fine! Go figure.

[solved] Sudden reboot while watching youtube video

*[edit]*
Nevermind. I've just noticed that the over clock is blinking. Apparently the power went out for a second.
Well, that was fun.
*[/edit]*
I was watching a video on youtube just now (on x86_64, with the flashplugin package from [multilib]) when the system suddenly rebooted. During the reboot it recovered and recommitted the journal and everything seems to be fine, but now I'm worried.
I can't find anything in the logs to indicate what could have happened but maybe I'm looking in the wrong place. What should I check?
I don't even know if this has anything to do with flash. I had lmms open too, and maybe cmus.
For your amusement, here are the thoughts that when through my head right after the screen suddenly went black:
wtf, did I forget to plug in the charger again?
wait, i'm not on the laptop
oh fsck*
* The last time a system suddenly died on me, the psu had burnt out... which itself was funny, because I noticed the smell of burnt plastic and rubber before it happened. I assumed it was coming from outside, closed the window, and went to get a drink. When I came back, the system was dead and I had a little epiphany regarding the source of the previous smell.
Last edited by Xyne (2011-07-07 18:28:14)

karol wrote:Let's stick to power issues for now:
- are you using an UPS? Maybe there was a small power outage and w/o a battery support your computer went off and on when the power came back a second later.
- a short-circuit of some kind?
Heh, I just realize the same thing and edited the OP before I saw your post.
I didn't even think of that possibility before I saw the clock though, because the computer instantly rebooted. I've never noticed the power go out for less than a second.
Thanks for the reply.

MBA 11' - Sudden reboot / Crash

Similar Messages

Maybe you are looking for