IMac shut down unexpectedly and automatically cleared cache + reset safari

for weeks now i've been dealing with the terrible problem my g5 shutting off for no apparent reason. it's happened anywhere from 2-50 times per day. on nearly ever occasion when the computer restarted it made the loud 'vroom' noise it typically does, but the last time it shut down there was no 'vroom' and when i went to safari my entire history had been reset. is there anyway to retrieve this (yes, i know it's probably the least of my problems, but there are a few things for a few weeks ago that i'd very much like to get back to TODAY).
thanks,
Jeremiah

"when i went to safari my entire history had been reset. *is there anyway to retrieve this* "
The Safari users hang out over on the Safari for Mac Forums.
"when the computer restarted it made the loud 'vroom' noise it typically does,"
Mac OS X 10.6 Help: Checking a disk to see if it’s going to fail
Failing Hard Drive Sounds
How to Tell When Your Hard Drive is Going to Fail
I noticed your system info mentions that your HD is new from last summer. All HDs come w/a warranty some lasting for 5 years. Contact the HD manufacturer.
====================
It would help the knowledgeable users here if you would advise which model/generation iMac G5 you have. Each generation has different issues & troubleshooting methods.
http://docs.info.apple.com/article.html?artnum=301724-en *How to identify your iMac*
http://docs.info.apple.com/article.html?artnum=86817 *iMac G5: Loose power cord could cause power loss*
http://docs.info.apple.com/article.html?artnum=301733 iMac G5: *How to Reset the SMU (iMac G5, the iMac G5 (Ambient Light Sensor), and the iMac G5 (iSight)).*
http://docs.info.apple.com/article.html?artnum=2238 *Resetting your Mac's PRAM and NVRAM*
!http://i50.tinypic.com/izvwo1.gif!

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My imac shuts down unexpectedly and now a fan is running??

Hello,
I have been working on my iMac all morning and it shut down twice within a half hour and I had to press the start button on the back to get it going again. Now their is a loud fan running and I have no idea what is going on. Help much appreciated. Thanks in advance!

Hi ebeugs,
Thanks for visiting Apple Support Communities.
If your iMac shut down unexpectedly, and the fan is running unusually fast or loud, you may need to reset the System Management Controller.
I recommend following this troubleshooting method:
Before Resetting the SMC
Try each of the following steps in this order before you reset the SMC. Test the issue after completing each troubleshooting step to determine if the issue still occurs.
Press Command + Option + Escape to force quit any application that is not responding.
Put your Mac to sleep by choosing the Apple () menu from the upper-left menu bar and then choosing Sleep. Wake the computer after it has gone to sleep.
Restart your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Restart.
Shut down your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Shut Down.
If the iMac unexpectedly shuts down again, or the fan continues running unusually fast or loud, follow these steps:
Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
You can find these steps and more information about resetting the SMC here:
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
Best Regards,
Jeremy

IPad shuts down unexpectedly and does a time reset

Hey,
I have an iPad2 iOS 5.0.1 and I have this problem:
When I ever try to just use my iPad normaly like playing or listening to music for somereason it shuts down everytime. after powering the iPad up and it does a time reset to 01.01.1970 4:00 AM , hard reset doesnt work with me I have to plug it to the charger when plugging it an empty battery picture shows up even though it's at 100% full battery I don't know if it's a hardware problem or a software problem. Does any one have the same problem as I do?
I'm hoping that I can find an answer or a solution here

Khalloof-
If the empty battery picture shows up, you do NOT have a 100% full battery unless there is a loose connection inside the iPad. The time reset makes me think that is the problem.
If you can show it to an Apple Store Genius, you may get a new iPad on the spot. If there is no Apple Store near you, search for an Apple Authorized Repair Center near you. There may be one in your city.
Fred

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Why does my iMac shut down unexpectantly?

Check System Preferences > Energy Sacer > Schedule
And try disconnecting all periphals except for the keyboard and mouse.

It shuts down unexpectedly and then it says something like "Overheat or something

Hi! My HP laptop is Pavilion dm4.
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Compressed air is completely safe to use on the laptop.I use it every couple of months to clean both of mine and even inside the case of my desktop. Just be sure the laptop is shut down and keep the can in upright position. If not it can disperse some of the liquid propellant in the bottom of can.
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**Click Accept as Solution on a Reply that solves your issue to help others**

My MacBook Pro shut down unexpectedly and won't connect to wifi now.

My MacBook Pro shut down unexpectedly and won't connect to wifi now. All other devices in my house are connecting to the wifi just fine. The laptop just refuses to connect. Any ideas on how to fix this/what it might mean?

Try a SMC reset:
http://support.apple.com/kb/HT3964
Follow directions for "A battery you should not remove yourself"
Check the mage safe connector and port for any debris.

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My one month old macbool pro shut down unexpectedly and is not starting up the magsafe led is faint orange and flickering what to do now???will I be charged by apple istore ??? I'm very panicked please reply

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Welcome to Apple Support Communities
It seems like your logic board is damaged. As your computer is in warranty, you will get your MacBook repaired for free if you take it to an Apple Store or reseller. Furthermore, you may receive a new MacBook

HT1414 why does my iPhone 5s shut down unpredictably and needs to be reset every time to start back up?

why does my iPhone 5s shut down unpredictably and needs to be reset every time to start back up?

Hi Cyprus11,
Thanks for visiting Apple Support Communities.
If your iPhone is shutting down unexpectedly, I recommend going through these troubleshooting steps:
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
Will not turn on, will not turn on unless connected to power, or unexpected power off
Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIs and corrosion.
Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
After at least 30 minutes, if:
The home screen appears: The iPhone should be working. Update to the latest version of iOS if necessary. Continue charging it until it is completely charged and you see this battery icon in the upper-right corner of the screen . Then unplug the phone from power. If it immediately turns off, seek service.
The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
If the display turns on, go to step 4.
If the display remains black, go to next step.
Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.
Best,
Jeremy

Safari is running very slow. I have cleared cache, reset safari, and put in new DNS 208.67.222.220 runs worse now.

Safari is running very slow. I have cleared cache, reset safari, and added DNS Servers 208.67.222.222.

Mac Mini connected directly to modem by ethernet cable. Ipad loads same web pages much faster. Again thanks for help.
Hardware Information:
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          Mac mini - model: Macmini4,1
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Video Information:
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Startup Items:
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System Software:
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Disk Information:
          Hitachi HTS545032B9SA02 disk0 : (298.09 GB)
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USB Information:
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Kernel Extensions:
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IMac shut down unexpectedly. I tried to restart and it did for a bit, then immediately shut down again. I've had it for 3 years and this is the first problem. I can't turn it on to give specs. Any suggestions?

I purchased an iMac approx 3 years ago. We keep it on almost all the time, however the other night we noticed it was off. We did not shut it off as we were downstairs watching a movie. I unplugged the cord, waited 10 to 15 seconds, plugged it back in, wait for a few more seconds and turned it on. It started up and was almost done booting. Then it shut down again and I have only gotten it to attempt to turn on. (the fan kicks in for about 2 seconds and then nothing) Any suggestions?

Try that process of resetting the SMC two or three more times, sometimes it takes more than once. if that doesnt work I could only suggest making an appointment and hauling it in for service.

IMac shut down suddenly and won't boot back up

This morning my iMac shut down suddenly. All I had open was Google Chrome and I was just on Facebook and that's it. When I tried to boot it back up, it wouldn't load past the startup sound, wherein it would appear to shut back down,or at the very least the screen would go black (my mouse has lights that stay on when the computer is on, and the light kept going on and off while the screen remained black). This was the case for at least a half hour until it suddenly booted itself back up all on its own. I had it on throughout the day, just browsing the internet and watching Youtube. It shut itself down twice during the day, and both times it restarted on its own right away after showing me a grey screen with the Apple logo and a progress bar. Now it just shut itself down again and it won't make it past the progress bar screen - if it even makes it that far, sometimes it shuts off right after it makes the startup sound. It keeps trying to boot up on its own over and over again, but it keeps shutting down right away. All the fixes I've searched for so far require a computer that actually boots up all the way so I don't think I could run any reports if I tried!
I'm running the latest version of Yosemite (10.10.2?).
Model number A1311
Not entirely sure what specs are useful to know so I'm just gonna write some of what's on the box it came in:
3.2 GHz Intel i3 processor, 4MBshared level 3 cache
4GB of 1333MHz DDR SDRAM
1TB serial ATA hard drive
ATI Radeon HD 5670 graphics processor with 512 MB of GDDR3 memory
Bought it around fall of 2010. Not sure if it's worth trying to get it fixed (I live nowhere near an Apple store) or if I should just get a new computer, but I would like to know what's wrong, if possible.

Try to boot into the Recover Partition by holding down the Command + R keys on startup. If it still won't boot then the HD has probably crashed. The is likely a AASP in your area, you can locate one by clicking AASP Locator, take it to one to be professional diagnosed. If it's only the HD, assuming you have been backing up, restoring to a new HD is pretty simple.

IMac shuts down unexpectedly since Yosemite

So, I apologize in advance for the long story:
I have a late-2009 27" iMac i7 with 8gb Ram and a 1TB HD. I updated my OS to Yosemite soon after it came out. Now, I admit I don't use the computer that often, so it took a while to notice the issues but, we first realized there was a problem in early November when my husband could not download a game (presumably because of the wi-if connectivity issues supposedly fixed in the latest update). It was around a week after he finally was able to download tthe game, that he was playing it and the computer would just shut down out of nowhere. No warning, just shut down and restart with the "your computer shut down unexpectedly" screen. Now, because it happened so many times, I started to get worried about all of my photos and music that is stored on thIs computer, so I went to do a back-up on my time capsule. This was when I noticed my computer had at some point been renamed (not by any human) to "my Computer (3)" when prior to yosemite (as far as I can tell) it was named "my computer". Also at this point I could not for the life of me get the time capsule to back up the computer as it was looking for "my computer" and all that was available was "my computer (3)". This is when it had been working flawlessly for years. I ultimately had to wipe the TC completely, reformat it and start a back up from scratch. It was for the short period of time that the time capsule was not connected to the computer that we noticed it was no longer shutting down unexpectedly. however, one the TC was reconnected and doing a back up, anything extra that you would be doing (with the exception of web surfing) caused the computer to crash. So, simple fix, right? Turn off the auto back ups while and try to remember to turn them on every so often. fine , dandy, whatever. However, I have done the latest yosemite update and the wi-if still does not seem to be staying connected, disconnecting every few minutes. Now I'm seemingly having more issues with a game that is well within the limits for my computer and the game will not start. There are just so many things going wrong with the computer that I'm really concerned that everything is going to disappear off of it one day. Anybody have any clues as to my computer's issue??

Try these in order testing your system after each to see if it's back to normal:
1. a. Resetting your Mac's PRAM and NVRAM
    b. Intel-based Macs: Resetting the System Management Controller (SMC)
2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the Utilities menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
3. Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the Utilities menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu. Select Restart from the Apple menu.
4. Reinstall Yosemite: Reboot from the Recovery HD. Select Reinstall OS X from the Utilities menu, and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
            because it is three times faster than wireless.
5. Reinstall Yosemite from Scratch:
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
How to Clean Install OS X Yosemite
Note: You will need an active Internet connection. I suggest using Ethernet if possible
            because it is three times faster than wireless.

21.5" iMac shuts down unexpectedly. How do I fix this?

My iMac (Aug 2010 purchase) shuts down unexpectedly when I put it to sleep occasionally.

Set the Screen Saver Preference to Never.
Set the Computer Sleep to Never, the display to 5 or 10 min. and uncheck all the boxes.
Check to be sure that Sleep or Shutdown are not Scheduled.
Reset the SMC > http://support.apple.com/kb/HT3964
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Press and hold the power button for 5 seconds.
4. Release the power button.
5. Attach the computers power cable.
6. Press the power button to turn on the computer.
Then test the computer for a few days, only sleeping it from the drop down menu when your done at the end of the day.
Dennis

HT201257 Imac shuts down unexpectedly then restarts then shuts down again

IImac shuts down unexpectedly then restarts then shuts down again

Hi bria90,
That is not good thing to have. Lets see if we can get it to boot up normally. Start with checking out the article below and go over each troubleshooting option that is available to get it back up and running. It will have you check things Safe Boot and resetting the NVRAM.
Mac OS X: Gray screen appears during startup
http://support.apple.com/en-us/HT204325
Take it easy,
-Norm G.

IMac shut down unexpectedly and automatically cleared cache + reset safari

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