Intel Mac :: Shuts Down By Itself Ocassionally For No Apparent Reason

Jun 28, 2012

My iMac shuts down by itself ocassionally for no apparent reason.It happened overnight last night.Here's the Problem Details report that appeared on restart.[code]

iMac, Mac OS X (10.7.4)

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OS X :: Crashed For No Apparent Reason?

Nov 24, 2010

ok so i suppose the inevitable had to happen. and so my mac OS X crashed badly within a few days of my getting this new MBP!

i had a short word document open in 1 workspace some firefox tabs in another, and was checking out the movies in my ext HDD (formatted with NTFS).and suddenly i start seeing this multi colored round icon which i guess is the cousin of the windows hourglass. after trying unsuccessfully to force quit, i was forced to hut down using the boot up button. yes, the same procedure that wreaks havoc on the HDD.

- so my questions are - what to do if even force quit doesn't work ? its surprising that it didn't in this case, as i have used ubuntu for almost 3 years and never had the OS crash on me! of course there were a few application crashes but the force quit always worked. and there was the keyboard shortcut - Ctrl+Alt+Del.

- also what is the norm with macs in this regard ? do they crash often and for the flimsiest of reasons as in my case ?

- probably i am not aware of the Mac OS equivalent for the Ctrl+Alt+Del function that almost always works in ubuntu. so is there some key combination that is guaranteed to work in the even that even force quit does not?

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OS X :: High CPU Usage For No Apparent Reason?

Oct 7, 2009

A few days ago I found that launchd was constantly using around 14% of my CPU (via iStat), which drastically lowered my battery life and caused my CPU to reach 75 degrees Celsius and higher. Initially I thought that SL just needed to do something, so I ignored it. But it has persisted for a few days now, so I decided to do something about it.

I checked the Console and nothing appeared to be repeating itself, so what I did was use MainMenu to perform a batch of system maintenance tasks, and then left my Mac on overnight to see what Console would report. Besides hourly instances of "kernel" running "iCalHelper" and "SubmitDiagInfo", there was nothing else.

However, launchd lowered its CPU usage to about 3%, but it is still constant and my CPU is still at a constant 40-50%. Activity Monitor says the following processes are (constantly) taking only 1-4% of the CPU:
...and others
The CPU is reported as 35% User and 20% System. But I am not running anything besides Activity Monitor.

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MacBook Pro :: It Has Just Started Getting Really Warm For No Apparent Reason?

May 23, 2012

Should I use my Apple Care, or is there a quick fix?

MacBook Pro

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OS X Mavericks :: MacBook Pro Keeps Crashing For No Apparent Reason?

Aug 27, 2014

my MacBook Pro keeps crashing. 

Anonymous UUID:  
Wed Aug 27 14:18:24 2014
panic(cpu 0 caller 0xffffff80250dc24e): Kernel trap at 0xffffff80250c6d91, type 13=general protection, registers:


MacBook Pro, OS X Mavericks (10.9.1)

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OS X Yosemite :: (10.10.1) IMac Restarts For No Apparent Reason

Dec 5, 2014

My iMac ( late 2012, 27", 3.4 GHz i7, 16 GB RAM, 3TB Fusion Drive, OS X 10.10.1 ) has taken to randomly restarting for no reason that I can find. It seems to be mostly when I am not actually doing anything, but, as I say, it's random. It did it five times in about half an hour the other day, then it didn't do it for a day or so, but it just did it again, which prompted me to ask. I have run Tech Tool Pro 7, and everything has passed. I have repaired permissions ( there were lots ). What next?

iMac, OS X Yosemite (10.10.1)

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Hardware :: High Exhaust Fan Speeds For No Apparent Reason

May 16, 2010

I have had my MacBook for 3 years and it has run great. Recently I have noticed that my exhaust fan has been hovering around 6000 RPM for no apparent reason. When I took that screen shot I only had Safari Open. Here's the vitals on my Mac..

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OS X :: Browser (Firefox / Safari) Crashed For No Apparent Reason On 10.4.11

Aug 6, 2009

I'm having a hell of a time with my mac. It started out when firefox would crash for no apparent reason, asking to send in an error report and eventually it got to where mac itself would crash, turning the screen dark with a picture in the middle appearing saying "You need to restart your computer. Hold the power button down for 2+ seconds". I've tried a lot, I've repaired permissions using the disk utility, I've reinstalled Java and I even verified the disk using the disk utility which seems to be the problem. It said my mac needed the system to be repaired. Except I've got a big problem: I just moved and I don't have the apple hardware test disc, so I'm stuck. Then, today I tried to use Safari instead of Firefox and even it is crashing. This is really irritating, I thought it was a virus until I downloaded a free antivirus that said it wasn't.

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MacBook Air :: Constant Reboot Cycle For No Apparent Reason

Jan 25, 2010

I have loved and cherished my MacBook Air for two years now, but last night it went in to a reboot cycle for no apparent reason. Now every time it gets to the apple logo I get the rotating "thinking" ident under the apple logo and it restarts, continually. I did the hardware test (holding down "D".....that was fine.) I also reset the PRAM... so the troubleshooting keystrokes work.

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OS X V10.7 Lion :: The Audio On Laptop Is Off For No Apparent (muted) Reason?

Jun 27, 2012

The audio on laptop is off for no apparent (muted) reason.

MacBook Air, iOS 5.1

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Mac Mini :: External HD (for Time Machine) Wakes Up For No Apparent Reason

Apr 12, 2010

I have a Mac Mini with two external WD MyBook's attached. The drive in question, is configured for Time Machine backups every four hours. It should sleep the rest of the time. But every once in a while, it wakes. I just revs up for no reason, then after a short while it goes back to sleep. It can happen when I open a folder, open a file, click a link in the browser or some other seemingly unrelated action.

I tried to untick the "Put the hard disk(s) to sleep when possible" to see if I then at least could get the drive to stay awake instead. This did not change the behavior at all.

Does anybody have a clue what I can do, to get OS X to leave that drive the hell alone, other than Time Machine??

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MacBook Pro :: Lost Very Large Amount Of Disc Space For No Apparent Reason?

May 11, 2012

I have 750GB MacBook Pro and up until the other day I showed 250GB used and 500GB unused. I discovered this because the past two days my computer would just freeze and I couldn't do anything. So I ran the Disc Utility and it found some errors and fixed them. So I'm wondering if the 400GB of lost disc space now has something to do with the computer locking up? I've searched all the folders and added up their size and still come back to 250GB that I can see. So I'm assuming there's something hidden somewhere that's eating up over half my hard disc space?

MacBook Pro (15-inch Late 2011), Mac OS X (10.7.4)

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Hardware :: IBook Shuts Down For No Reason

Feb 5, 2008

Recently my computer has been shutting down for no apparent reason. I needed a new battery so I assumed that this was the reason. Now I've replaced my battery but my computer continues to completely shut down.

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MacBook Pro :: Brand New Shuts Down For No Reason?

Mar 26, 2012

My two week old Mac Pro shut downs for no pparent reason. Using the wireless, not plug in to an outlet but battery fully charged. Both times happen within 15hrs. apart.

MacBook Pro, iOS 5

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MacBook :: Unable To Charge Battery - Shuts Down For No Reason

Dec 8, 2010

Sometimes my MacBook will shut off for no reason, and then it won't charge anymore. It takes a lot of effort to get it to start charging again, but I don't get it. I don't know what's wrong with it. It just started happening randomly, I don't know what to do. It's under warranty, but I wanted to see if anyone else was having this problem as well? If there's any quick fixes please let me know

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MacBook Pro :: Shuts Down For No Reason At 95 Percent Battery - OS X Mavericks 10.9.2

Aug 31, 2014

MacBook Pro 13-inch early 2011 running OSx 10.9.2 which shutsdown for no reason at 85-95% battery.

I found that this problem is resolved with a firmware fix by applying the latest version of OS to Maverick.

What is the current version of OS for my system?  How much memory can I put on this computer?

Currently have 2-2MB chips on it.  Can I replace those with 2-4MB chips for a total of 8MB to make it faster?

MacBook Pro, OS X Mavericks (10.9.2)

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IMac (Intel) :: OS X 10.9.4 Software Updates Apparent Cause Of Corel Painter X3 Crash

Aug 31, 2014

iMac 10.9.4 software updates last week is apparent cause of my Corel Painter X3 now crashing. I ran Disk Utility check - no probs there. I reinstalled Painter X3 (after first uninstalling X3), still no success.

iMac (27-inch, Late 2013), OS X Mavericks (10.9.4)

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Intel Mac :: OS X Keeps Muting Sound For No Reason

Jun 21, 2012

This is really getting old. Now I want to return the $4000 computer and go back to Microsoft. I've seen discussions dating back to 2007 about Macbooks and iMacs automatically muting themselves with no solution. APPLE FIX THIS NOW. Enough of this problem. Write your OS so that it is IMPOSSIBLE for the iMac to mute itself

Now, before I return this hunk of junk, can you please tell me how to STOP this iMac from muting itself? (In system preferences/sound/output, the Mute box is checked and GRAYED OUT so that it cannot be changed by the ADMINISTRATOR (why on earth would you program it to do that?).

Info:iMac, Mac OS X (10.7.4)

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Intel Mac :: Most Common Reason For IMac To Slow Down?

Feb 9, 2012

I am running an iMac on OS X 10.6.8 with 2.16GHz intel core 2 Duo. Recently I have seen the computer slow down with spinning wheels all the time and the sound of the hard drive turning over.

iMac, Mac OS X (10.6.8)

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Intel Mac :: For Some Reason Mail Has Stopped Working?

May 7, 2012

I noticed yesterday that when I opened mail, it kept trying to get mail off the sever even though everything downloaded.  Today when I open I just get the colored wheel and I must force quit everytime. 

iMac, Mac OS X (10.7.3)

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IMac (Intel) :: Randomly Shutting Down For No Reason?

Aug 30, 2014

I have had this for the last few days, so I don't really know what's going on... 

Anonymous UUID:       D4B5793A-92CF-4E5D-33F8-94D77B084C5C  
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


iMac, OS X Mavericks (10.9.3)

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Intel Mac :: It Shuts Down Unexpectedly?

Apr 4, 2012

Three times today, my iMac has shut down while working. This has never happened before. Could it be related to the external backup drive, a G Drive Mini, pulling too much power?

iMac, Mac OS X (10.7.3)

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Intel Mac :: Suddenly Shuts Down While Online?

May 20, 2012

My imac suddenly shuts down while on line. It has to be unpluged for a couple of hours before it will restart. Could it be the battery dying?

iMac, Mac OS X (10.6.8)

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Intel Mac :: Shuts Down With Install Disk 2?

May 24, 2012

I'm reinstalling since it seems the only solution to a failure of the drag and drop function. But disk two of the reinstall disks does not complete, I get a grey screen must restart computer in 4 languages. The computerr rejects other disks like tech tool, it wants to complete the reinstall with disk 2 only. Very frustrating. This is the iMac duo core from @ 2006? when they first came out.

iMac, Mac OS X (10.5.8)

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Intel Mac :: 2.8 Ghz Intel Core I5 Shuts Off?

Feb 20, 2012

I have an iMac 2.8 GHZ intel core i5 that, without any warning or strange sounds, shuts completely off.  It is 27-inch, Mid 2010 model. I have 16gb ram running Lion 10.7.3.

iMac, Mac OS X (10.7.3)

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Software :: G4 Crashes For No Apparent Reasons

Jan 27, 2010

I recently purchased a PowerBook G4 it had 512mb ddr2 ram as standard so I went out and bought a 2gb stick for it. After removing the 512mb stick and installing the 2gb stick it worked fine, and then it started to crash without anything being done, so initially I borrowed a known to be working stick of the ram and put that in and the errors keep coming up? Even with the original stick it seems to be crashing for no apparent reason. Before I installed the new stick it was working fine the the 512mb stick, but she still does it with the original stick.

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Intel Mac :: It Shuts Down Or Stops Responding During Startup

Mar 27, 2012

My imac is about 18 months old. Latest software download.Will not start up properly. After the Apple Logo, sign comes up on the screen stating "startup disk is full".


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Intel Mac :: It Shuts Down When I Attach Ethernet Cable

Jul 2, 2012

When I start the iMac without the ethernet cable it starts. When I attach the ethernet cable it shuts down immediately. It will not start with the cable attached.

Info:iMac, Mac OS X (10.5.8)

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IMac (Intel) :: Shuts Down During Load Up Screen

Aug 24, 2014

I just got home and I realized the power was out. I bought this iMac literally like two months ago (I actually bought one two months ago but it wouldn't even turn on so they gave me a new one) It was working perfectly fine, and I was writing a report. I left the computer on and left the house only to return hours later with the power out, and when I turn it on it shows the start up screen with the Apple Logo, the little progress circle, and a progress bar that fills up to the end everytime but once it fills up to the end it stays there for a few minutes then the computer shuts off. 


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Intel Mac :: When Try To Backup Something Or Transfer Large Quantities Of Data - The Backup Just Stops For No Reason?

Mar 24, 2012

When i try to backup data or transfer large amounts of data, like 40gb or more, between drives, the process just stops without warning or explanation. It dowsn't matter when backup i use, Time Machine or WD Smartware.

iMac, Mac OS X (10.7.3)

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