Why my 2009 desktop with OS Maverick keep shutting down by itself

Why my 2009 desktop using OS Maverick keep shutting down by itself?

When it shuts down, the screen blanks (more like turns grey, like the color of the background when on the log in screen). It reboots immediately, so at first the problem was presumed to be restarting, not shutting down and powering back on. The computer is usually very warm, and definitely gets hot easily. A test was run determine when the fan would turn on to start cooling the computer by running digits of Pi, and the tester concluded it was too close within the safe temperatures before it would permanently affect the computer. (I believe this was within 5ºF, but I am not 100% sure.) The times when it will turn off and reboot do not seem coorelated with much if anything. It has done this at multiple times, among running varying amounts of programs and for different lengths of time: right after logging into the user, within a minute of after it has turned off and rebooted, within 5 minutes, 10, 30, even 60 minutes of turning off and rebooting, when only running one program such as Firefox, when running various programs such as Firefox, iTunes, Microsoft Word, Sticky Notes....
Basically, it makes no sense.

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I've been working with Mac for 30 years or more and although I'm hands on taught the only thing I lack is the newer "buzz words" so if you can help me out - please make it simple ?? thanks

There is no need to download anything to solve this problem.
You may have installed one or more of the common types of ad-injection malware. Follow the instructions on this Apple Support page to remove it. It's been reported that some variants of the "VSearch" malware block access to the page. If that happens, start in safe mode by holding down the shift key at the startup chime, then try again.
Back up all data before making any changes.
One of the steps in the article is to remove malicious Safari extensions. Do the equivalent in the Chrome and Firefox browsers, if you use either of those. If Safari crashes on launch, skip that step and come back to it after you've done everything else.
If you don't find any of the files or extensions listed, or if removing them doesn't stop the ad injection, ask for further instructions.
Make sure you don't repeat the mistake that led you to install the malware. It may have come from an Internet cesspit such as "Softonic" or "CNET Download." Never visit either of those sites again. You might also have downloaded it from an ad in a page on some other site. The ad would probably have included a large green button labeled "Download" or "Download Now" in white letters. The button is designed to confuse people who intend to download something else on the same page. If you ever download a file that isn't obviously what you expected, delete it immediately.
Malware is also found on websites that traffic in pirated content such as video. If you, or anyone else who uses the computer, visit such sites and follow prompts to install software, you can expect more of the same, and worse, to follow. Never install any software that you downloaded from a bittorrent, or that was downloaded by someone else from an unknown source.
In the Security & Privacy pane of System Preferences, select the General tab. The radio button marked Anywhere should not be selected. If it is, click the lock icon to unlock the settings, then select one of the other buttons. After that, don't ignore a warning that you are about to run or install an application from an unknown developer.
Still in System Preferences, open the App Store or Software Update pane and check the box marked
          Install system data files and security updates (OS X 10.10 or later)
or
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My mac keeps shutting down by itself

My mac keeps shutting down by itself. Seems to be when I'm trying to edit video on FCPX or when kids are playing a game. Its an older 2009 20" imac 2.66 Ghz Intel core Core 2 Duo running OS X 10.9.4
How can I stop this please? Thanks

These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
For this step, the title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
In the top right corner of the Console window, there's a search box labeled Filter. Initially the words "String Matching" are shown in that box. Enter "BOOT_TIME" (without the quotes.)
Each message in the log begins with the date and time when it was entered. Note the timestamps of the BOOT_TIME log messages, which refer to the times when the system was started. Now clear the search box and scroll back in the log to the last boot time when you had the problem. Select the messages logged before the boot, during the time something abnormal was happening. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
For example, if the system was unresponsive or was failing to shut down for three minutes before you forced a restart, post the messages timestamped within three minutes before the boot time, not after. Please include the BOOT_TIME message at the end of the log extract—not at the beginning.
If there are long runs of repeated messages, please post only one example of each. Don’t post many repetitions of the same message.
☞ When posting a log extract, be selective. A few dozen lines are almost always more than enough.
☞ Some private information, such as your name, may appear in the log. Anonymize before posting.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Step 2
In the Console window, select
          DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports
(not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar.
There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A crash report has a name that begins with the name of the crashed process and ends in ".crash". A panic report has a name that begins with "Kernel" and ends in ".panic". A shutdown stall report has a name that ends in ".shutdownstall". Select the most recent of each, if any. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot. It's possible that none of these reports exists.
I know the report is long, maybe several hundred lines. Please post all of it anyway.
☞ If you don't see any reports listed, but you know there was a crash or panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.
In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)
☞ Please don’t post other kinds of diagnostic report—they're very long and rarely helpful.

Why does my macbook pro keep shutting down by itself when I close the lid?

My macbook pro is shutting itsself down when I close the lid. Does anyone know why this is happening?

Solution may be found if you search in the "More Like This" section over in the right column.

My computer keeps shutting down by itself

Hi, I have a HP desktop PC. I runs great but in the last couple of days it seems to have a mind of it's own.
While your on it or off it, it only stays on for maybe 5 -10 minutes. Then it restarts by itself. Does anyone
know what could be causing this. I have checked all the settings and everything seems OK. Can someone help?

I've always had good luck just cleaning out the fan areas with compressed air.
Bill|Senior Social Media Specialist | Best Buy® Corporate
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IPhone keeps shutting down by itself

Hello People,
I need help, Yesterday i booted up my iphone and it crashes like each 5 minutes,
i see a white screen fastly and it crashes and shuts down, then it try's to reboot itself,
So i put it in the computer and updated my os to 4.3.5 (if thats the latest (not 5)).
But now when i plug it into the computer it goes on and off byitself.
Video of the crash: http://www.youtube.com/watch?v=SLBCkCiSZu8
How can i fix this or what could be the problem?
Kind Regards,
Gijsm

iPhone shutting OFF by itself is most often due to faulty battery. You have already done a Restore. Make Genius reservation and take iPhone to Apple Store for quick free battery dianostic testing to confim that it is a battery problem.

My Windows 7 Starter keep shut down by itself 6-7 time a day.

My Notebook shut-down often, Can you please help me to rectify. I have checked the log note as: Kernel Event Tracing - #Session "Microsoft Security Client OOBE " stoppedd due to the following error: 0xC000000D # What is this problem? Thank.

Fro Hotogeek:
This procedure appears to solve the issue.
It MUST be done Exactly by the Steps.
1. DISABLE the Microsoft Antimalware Service
2. REBOOT the machine
3. DELELETE the EppOobe.etl File
(Reference Path) C:\ProgramData\Microsoft\Microsoft Security Client\Support\EppOobe.etl
4. REBOOT the machine
5. ENABLE the Microsoft Antimalware Service
6. REBOOT the machine
7. Frequently CHECK the Administrative Events Log under Custom Views to ensure the error does not reappear.
NOTE: Just Deleting the EppOobe.etl file and Rebooting will NOT work.
M.

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My macbookpro keeps shutting down by itself! It also makes a loud noise why I try to boot it up again.

Reset the SMC and PRAM following the procedure outlined here: http://docs.info.apple.com/article.html?artnum=303319 and http://docs.info.apple.com/article.html?artnum=2238
The loud noise is probably the startup chime, but if it's always loud, then your computer isn't saving the volume settings from the previous session.

My July 2009 iMac with OSX Mavericks "iMac is not supported" when I tried to perform bluetooth with my iPhone 5. What is the problem. thanks

My July 2009 iMac with OSX Mavericks "iMac is not supported" when I tried to perform bluetooth with my iPhone 5. What is the problem. thanks

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why does my 4s with ios7 wifi keep disconnecting/reconnecting?

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why does my 2009 27" imac keep shutting down?

Could, also, be failing hard drive , power supply or logic board.
You may have to make an appointment and take your iMac in to Apple or Apple authorized repair center for diagnostics and a repair estimate.
If your iMac has a 1 TB internal hard drive, it maybe a Seagate drive and maybe eligible for free replacement under the Apple Seagate 1 TB internal hard drive replacement program.
If you can get your iMac running, you need to backup all of your data ASAP!. Either backup to optical disc, flash drive/s or purchase an external hard drive for backup. You can use a data cloning program such as CarbonCopyCloner or SuperDuper to make an exact copy of your iMac's internal hard drive.
You can check for eligibility for free hard drive replacement by inputting your iMac's serial number here.
http://www.apple.com/support/imac-harddrive/

Why does my macbook pro keep shutting down with a charged battery

Why does my Mac book pro keep shutting down? I lose everything I am working on when it shuts down help

kva,
which model MacBook Pro do you have? Is it running Mac OS X 10.5.5? If not, which version of OS X is currently installed on it?
Are you running on battery when it shuts down, or are you running on AC when it shuts down, or does it happen in either case? Which app are you working in when it shuts down? Does it happen only in that app, or does it happen no matter which app you’re working in?

HT201413 Why does Data Execution Protection or lack thereof keep shutting down iTunes

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Sounds like you have a battry issue but don't want to believe it.
If a car was running fine on one tank of gas, then you filled it up with another tank of gas and it began to run funny, one might suspect that tank of gas. But let's just say coincidence blew a valve-- would you think the new tank of gas was the culprit?
BUT WAIT!! It just might have been! The gas could have been of higher octane and put more more strain on the valves; you know, like going from 87 octane (OS6) to 93 octane (OS7) and showing you the engine was on the edge of compromise.
Sometimes you have to go with common sense. If everything else is ruled out, it must be the battery. And if it runs fine one moment in OS6 but immediately ***** in OS7, I'd believe my battery was suspect-- though comfy-- in OS6 but the OS7 showed its true power.
Moreover, if you had the answer-- or didn't want to believe someone's more competent advice-- why did you even call? You've already shown that you don't know much when you asked if you could go backwards after setting up the new OS as a new phone.
Additonally, if you're such the know-it-all, but yourself the $29 battery and put it in yourself. It's a piece of cake.
<Edited By Host>

Why is it that my iMovie app keeps shutting off randomly! I'm trying to export my movie and it shuts down each time it's a 1/4 of the way through downloading! Ah! Please help.

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TS1363 Why does my I-Tunes keep shutting down every time I try to go to the I-Tunes store?

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Hi sidro1!
Here is an article that will help you troubleshoot this issue with your iTunes application:
iTunes for Windows Vista, Windows 7, or Windows 8: Fix unexpected quits or launch issues
http://support.apple.com/kb/ts1717
Thanks for using the Apple Support Communities. Have a good one!
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Why my 2009 desktop with OS Maverick keep shutting down by itself

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