IMac shuts down unexpectedly - Mountain Lion

Have recently installed Mountain Lion on my iMac mid -2011. Yesterday when i was on skype the mac shut down. I restarted it and then it made a funny noise nd then shut down again. Today when I leave in sleep mode it shuts down whenever I leave for more than 5 mins. This has never happened before and I suspect it could be something to do with installing ML. Has anyone else experienced this? Solution?

Bootup holding CMD+r, or the Option/alt key to boot from the Restore partitirion & use Disk Utility from there to Repair the Disk.
If that doesn't help Reinstall the OS.

Similar Messages

2007 imac shuts down intermittently mountain lion

I recently upgraded my mid 2007 from snow leopard to mountain lion and have noticed a few times since then that my mac shuts itself down if I leave it for a spell without using it (with safari pages open). I have it set to use screensaver after 15 mins. I added a DiNovo edge keyboard at around the same time so I don't know if its the OS or the keyboard thats causing problems. It usually has to be booted up from the button at the back as the usual pressing keyboard buttons to wake from 'sleep' doesn't work - each time it goes through the process of apple/grey screen/ wheel to boot to the desktop - although the last time it did it - it booted trough the grey/apple/wheel straight to the safari windows I had left open.
Am I being thick - does ML have a hibernation option that loads through the grey screen/apple/wheel process in ML or is my Imac playing up (if it's the Mac -is it likely to be a hardware or software issue?i also have a WD external 2 TB Hdd attached (if thats of any relevance).
Cheers for any advice as I'm a bit stumped (especially as it always seems to shut down as my hubby wants to use it - so I'm getting the blame for doing it on purpose lol.

Bootup holding CMD+r, or the Option/alt key to boot from the Restore partitirion & use Disk Utility from there to Repair the Disk.
If that doesn't help Reinstall the OS.

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

Why does my iMac shut down unexpectantly?

Why does my iMac shut down unexpectantly?

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

Slow shut down with mountain lion 10.08.02

slow shut down with mountain lion 10.08.02
I purchased the ML 10.08.02, two days ago, and installed over Lion 10.06..., on my Mac Book Air 11', the shut down that with Lion was around 3 sec is actually long around 20 sec.
What to do ?
Thanks

Update. My slow shut down came back! And got fixed again. But Im not sure what happened to fix it. I did call apple and they had me reset my pram and do an smc reset. That didn't change anything. About an hour later, the problem went away. I have no idea what fixed it for me. But everything is running faster, opening quicker and my macbook is closing almost instantaneously. I have an internal SSD so it is fast to begin with. But I would say that with mountain lion, all of my applications are working faster. I use final cut pro x, so I use software that is very cpu demanding. This is the best OSX I personally have ever used. Wish I could figure out what actually fixed this problem for me. If I can, I will post it here. For now everything is better than before I upgraded to Mountain Lion!

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 shuts down unexpected

iMac shuts down after ca. 1 hour - 1hr40 running.
Can't restart afterm have to wait 2 - 3 hrs. before restarting,

After digging through a bunch of different posts, I've come to the conclusion that I had a over heating problem. In fact, the fan stopped running altogether causing it to overheat, then shut down.
The vents on the bottom were completely clogged with compacted dust. It was so bad that I literally picked out chunks of dirt with a toothpick. I was able to clean the fans blades by spraying compressed air thought the top holes.
Now she runs cool as a cucumber but there is still one small problem. The fan does not restart when I manually put her to sleep. I've had to stick a small screwdriver down one of the vents on top to give the fan a little "kick start".
At least the problem is nowhere near as bad as I thought it was.
G4 Imac Mac OS X (10.4.8) 1.25GHz 768mb

Kernal panic preventing shut down after Mountain Lion upgrade

Following upgrade to Mountain Lion, kernal panics are stopping shut down of my Mac from the apple menu. I have a late-2009 Mac Mini. OS X closes as normal but then restarts with message "Your computer restarted because of a problem". I have performed disk verfication, repaired permissions, reset VRAM and SMC. Booting from original hardware disc allows a normal shut down, so I suspect this is software related (probably Mountain Lion?). Kernal panic report from Console is below.
Reading this https://discussions.apple.com/thread/4135480?start=30&tstart=0 suggests problems with nvidia cards and Mountain Lion. My Mac Mini has the original nvidia card it shipped with (9600M) and if I disconnect the display just before shut down it (usually) seems to shut down normally so might be display related?
Other than the problem with shutting down everything is working normally. First instance of this problem was immediately after installing Mountain Lion. I am currently considering a full-reinstall of Mountain Lion from the recovery partition and using Time Machine to retrieve my settings etc, although I am concerned this will not work if it is a genuine bug.
Any assistance or solutions gratefully received!
Kernal Panic report:
Sat Jul 28 18:05:37 2012
panic(cpu 0 caller 0xffffff801ceb7b95): Kernel trap at 0xffffff801cec3dd0, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0xffffff8095537a20, CR3: 0x000000001f97b000, CR4: 0x0000000000000660
RAX: 0xffffff8081715100, RBX: 0x0000000000110000, RCX: 0x0000000000000440, RDX: 0x0000000000000040
RSP: 0xffffff80956dbea0, RBP: 0xffffff80956dbf20, RSI: 0x0000000000000440, RDI: 0xffffff8095537a20
R8: 0x0000000000110000, R9: 0x00000000000000ff, R10: 0x0000000000000000, R11: 0x0000000000000040
R12: 0x00000000954eac72, R13: 0x000000000000ac00, R14: 0x0000000000000000, R15: 0xffffff801d336430
RFL: 0x0000000000010002, RIP: 0xffffff801cec3dd0, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0xffffff8095537a20, Error code: 0x0000000000000000, Fault CPU: 0x0
Backtrace (CPU 0), Frame : Return Address
0xffffff80956dbb40 : 0xffffff801ce1d5f6
0xffffff80956dbbb0 : 0xffffff801ceb7b95
0xffffff80956dbd80 : 0xffffff801cece4ad
0xffffff80956dbda0 : 0xffffff801cec3dd0
0xffffff80956dbf20 : 0xffffff801cec4135
0xffffff80956dbf60 : 0xffffff801ce3dcae
0xffffff80956dbfb0 : 0xffffff801ceb2677
BSD process name corresponding to current thread: kernel_task
Mac OS version:
12A269
Kernel version:
Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64
Kernel UUID: 8D5F8EF3-9D12-384B-8070-EF2A49C45D24
Kernel slide:     0x000000001cc00000
Kernel text base: 0xffffff801ce00000
System model name: Macmini3,1 (Mac-F22C86C8)
System uptime in nanoseconds: 671825824236
last loaded kext at 34899759788: com.apple.driver.AppleHWSensor          1.9.5d0 (addr 0xffffff7f9ec32000, size 36864)
last unloaded kext at 190440926342: com.apple.driver.PioneerSuperDrive          3.1.0 (addr 0xffffff7f9eabc000, size 12288)
loaded kexts:
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.driver.AppleBluetoothMultitouch          75.15
com.apple.driver.AudioAUUC          1.60
com.apple.driver.ApplePlatformEnabler          2.0.5d4
com.apple.driver.AGPM          100.12.69
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleHDA          2.3.0f2
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f8
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.iokit.IOBluetoothSerialManager          4.0.9f8
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.AppleLPC          1.6.0
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.GeForce          8.0.0
com.apple.driver.AppleIRController          320.15
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.iokit.SCSITaskUserClient          3.5.1
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.2.0
com.apple.driver.AirPortBrcm43224          600.36.17
com.apple.driver.AppleFWOHCI          4.9.5
com.apple.driver.AppleAHCIPort          2.4.0
com.apple.nvenet          2.0.19
com.apple.driver.AppleUSBHub          5.1.6
com.apple.driver.AppleEFINVRAM          1.6.1
com.apple.driver.AppleUSBEHCI          5.1.5
com.apple.driver.AppleUSBOHCI          5.1.5
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.7
com.apple.driver.AppleACPIButtons          1.6
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.6
com.apple.driver.AppleAPIC          1.6
com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2
com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
com.apple.driver.AppleBluetoothHIDKeyboard          165.5
com.apple.driver.AppleHIDKeyboard          165.5
com.apple.driver.IOBluetoothHIDDriver          4.0.9f8
com.apple.driver.AppleMultitouchDriver          235.27
com.apple.kext.triggers          1.0
com.apple.driver.DspFuncLib          2.3.0f2
com.apple.iokit.IOAudioFamily          1.8.9fc9
com.apple.kext.OSvKernDSPLib          1.6
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f8
com.apple.iokit.IOSurface          86.0.2
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.iokit.IOBluetoothFamily          4.0.9f8
com.apple.driver.AppleGraphicsControl          3.2.6
com.apple.driver.AppleHDAController          2.3.0f2
com.apple.iokit.IOHDAFamily          2.3.0f2
com.apple.driver.AppleSMC          3.1.3d11
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.IOPlatformPluginFamily          5.2.0d16
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.nvidia.nv50hal          8.0.0
com.apple.NVDAResman          8.0.0
com.apple.iokit.IONDRVSupport          2.3.4
com.apple.iokit.IOGraphicsFamily          2.3.4
com.apple.iokit.IOUSBHIDDriver          5.0.0
com.apple.iokit.IOSCSIBlockCommandsDevice          3.5.1
com.apple.iokit.IOUSBMassStorageClass          3.5.0
com.apple.driver.AppleUSBComposite          5.0.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOAHCISerialATAPI          2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1
com.apple.iokit.IO80211Family          500.15
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IOAHCIFamily          2.2.0
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOUSBUserClient          5.0.0
com.apple.iokit.IOUSBFamily          5.1.6
com.apple.driver.NVSMU          2.2.9
com.apple.driver.AppleEFIRuntime          1.6.1
com.apple.iokit.IOHIDFamily          1.8.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          344
com.apple.iokit.IOStorageFamily          1.8
com.apple.driver.AppleKeyStore          28.18
com.apple.driver.AppleACPIPlatform          1.6
com.apple.iokit.IOPCIFamily          2.7
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0

Hello hotdavesweet,
It sounds like you have exactly the same problem as I have - nothing connected except the TV, permissions repaired, PRAM reset, etc.
Are you using Mountain Lion?? I had to downgrade to Lion to solve it. Unfortunately, a very similar problem occurs with the latest version of Lion (10.7.5). I'm sure that something with the latest updates is causing problems on certain Macs. I've filed a bug report with Apple so it may help if you do the same.
It could be a problem with using Samsung LCD TVs as monitors. Or maybe a graphics card issue - the user in this discussion: https://discussions.apple.com/thread/4316892?start=15&tstart=0 noted that a similar problem on a 2009 Mac Pro was caused by their (nvidia) graphics card driver.
Either way, I think it is something that Apple should address, even if it is only affecting a few users. Apple's mantra used to be that everything just works, but now I cannot upgrade to Mountain Lion with my setup (despite my Mac being easily capable of running it) and nor can I upgrade to Lion 10.7.5. It doesn't work as it should.

IMac Shuts down unexpectedly

After upgrading my mid-2010 17" iMac i7 to Lion 10.7.1 (from 10.7) it randomly shuts down. If I restart, it will last a while longer. Eventually it wont get passed the boot sequence.
Remove RAM and power for 10 minutes and I'm good to go for a short time. If I boot to another disk (Bootcamp with Windows, a bootable CD with Linux, etc) I can run it for hours without issue (I even tried running some games from Windows Boot Camp to tax the machine and had no issue). Go back to Lion 10.7.1 and the problems happen again.
Been on the phone with Apple Care a few times and not getting anywhere. I can bring it in to an Apple store, but I can't get any free time to leave and this thing is heavy.
Any ideas?
Note: Yes I have 16gb of RAM. No this is not the random shutdown issue that was rampant a year ago because Apple gave the wrong specs to 3rd party vendors (I had that issue back then, but switched to Samsung RAM and haven't had an issue in almost a year). To be safe, I've run a several memtest programs and Apple's hardware test program. All came back clean. Also reset pram, smc, system management controller, and tried safe mode.

Hello Jeff C.
Your story is frustratingly familiar. I have a late 2009 iMac 21 inch with 4 GB RAM.
In March 2011 it started to shut off randomly for no reason. I would sometimes be able to turn it on again via the power switch but most times it wouldn't get past the boot sequence and just shut down gain. If I left the power cord completely unattached for up to an hour or so, I could get the thing running but it would shut down again sometimes when I was not even using it!
Took it in for service. The registered provider (not Apple) couldn't find anything wrong. He left it on in the shop all weekend and it didn't shut down once.
Took it home and used a different power cord. For two months no problems....
In May 2011 same thing started happening. Took it in to Apple Store for a diagnostic and they recommended to change logic board which was done. For six months everything worked fine.
Now in November I'm working in InDesign and push some keystrokes and bam! The thing shuts down and won't boot up if I turn it on again. Finally get it going after leaving it unplugged for forty mins. Doing a time machine backup (and nothing else is running) and there she goes again!
It's back in the shop again and I just know they'll say it didn't shut down for them. Don't know if this is hardware or software related but getting so frustrated. Just want it to work! Do you have any updates on your end?
Sorry for long post....just needed to vent and I'm glad to see I'm not the only one this has happened to and that I'm not going crazy.
Melissa T

My iMac shuts down unexpectedly

I've got a iMac from I believe 2007 and it shuts down at least 15 minutes after boot up all the time. I've repartitioned the HD and reinstalled Mac OS X Lion. I ran an Apple Hardware Test from the original reinstall disks. I sthere any other way I can find out whats wrong with this before I bring it into an Apple store and pay money just for them to run diagnostics.

Before doing anything ensure you have a good backup of your system!!!!!!!!!
Run Apple Hardware Test in Extended Mode. Running it in the standard mode is pretty worhtless. Also check to see how much disk space is available on the HD. You can do this by selecting the HD in Finder then typing Command I (that's I as in Ivan) to see how big the HD is and how much space is available. Finally in Disk Utility check the S.M.A.R.T. status of the HD, it should say Verified, if it says anything else it's time to replace it.

Can I shut down while mountain lion is downloading?

I'm downloading mountain lion on my MBP (currenly have snow leopard). I started late last night, and left up all night. Its only about 1/8 finished looking at the loading bar. Does anyone know if ok to sleep or shut down computer in the middle of process. Will I loose the download if I do so, or will it pick up where it left off?

If it's just in the download phase, you can pause and resume. The best method is to open the Mac App Store and, on the Downloads page, hit the Pause button. But if you power off or put the Mac to sleep, it'll resume when you restart.
Tip: when the download finishes, go to Applications and find Install OSX Mountain Lion. Right-click, open the Resources folder, and amke a copy of InstallESD.dmg, which is the ML isntallation disk image. That way you won't have to redownoad if you have a problem

IMac shuts down unexpectedly when not in use

When I get back to my iMac after a long pause, it has shut down.
This is the log for what happened just before it shut down the last time.
21. des. 2014, 19.07.26 CalendarAgent[1323]: [com.apple.calendar.store.log.caldav.coredav] [Refusing to parse response to PROPPATCH because of content-type: [text/html; charset=UTF-8].]
21. des. 2014, 19.08.25 CalendarAgent[1323]: [com.apple.calendar.store.log.caldav.coredav] [Refusing to parse response to PROPPATCH because of content-type: [text/html; charset=UTF-8].]
21. des. 2014, 19.08.25 CalendarAgent[1323]: [com.apple.calendar.store.log.caldav.coredav] [Refusing to parse response to PROPPATCH because of content-type: [text/html; charset=UTF-8].]
21. des. 2014, 19.08.32 mdworker[18669]: Failed to obtain sandbox extension for path=/Users/elfinn/Library/Caches/mdworker. Errno:1
21. des. 2014, 19.08.33 mdworker[18669]: Failed to obtain sandbox extension for path=/Users/elfinn/Library/Caches/mdworker. Errno:1
21. des. 2014, 19.08.33 mdworker[18670]: Failed to obtain sandbox extension for path=/Users/elfinn/Library/Caches/mdworker. Errno:1
21. des. 2014, 19.08.33 mdworker[18670]: Failed to obtain sandbox extension for path=/Users/elfinn/Library/Caches/mdworker. Errno:1
21. des. 2014, 19.08.33 mdworker[18671]: Failed to obtain sandbox extension for path=/Users/elfinn/Library/Caches/mdworker. Errno:1
21. des. 2014, 19.08.33 mdworker[18671]: Failed to obtain sandbox extension for path=/Users/elfinn/Library/Caches/mdworker. Errno:1
21. des. 2014, 19.09.26 CalendarAgent[1323]: [com.apple.calendar.store.log.caldav.coredav] [Refusing to parse response to PROPPATCH because of content-type: [text/html; charset=UTF-8].]
21. des. 2014, 19.09.26 CalendarAgent[1323]: [com.apple.calendar.store.log.caldav.coredav] [Refusing to parse response to PROPPATCH because of content-type: [text/html; charset=UTF-8].]
21. des. 2014, 21.00.20 distnoted[1293]: # distnote server agent absolute time: 130.864989531 civil time: Sun Dec 21 21:00:20 2014 pid: 1293 uid: 506 root: no
21. des. 2014, 21.00.35 mdworker[1312]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8283710070
21. des. 2014, 21.00.36 mdworker[1312]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8285102890
21. des. 2014, 21.00.36 mdworker[1312]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8283505850
21. des. 2014, 21.00.36 mdworker[1312]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8283715960
21. des. 2014, 21.00.37 mdworker[1312]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8285106d90
21. des. 2014, 21.00.37 mdworker[1312]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f828500cad0
21. des. 2014, 21.00.50 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0e19a80
21. des. 2014, 21.00.54 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0f0b080
21. des. 2014, 21.00.54 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0c21a40
21. des. 2014, 21.00.55 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0d214b0
21. des. 2014, 21.00.55 mdworker[1305]: Failed to obtain sandbox extension for path=/Users/elfinn/Library/Caches/mdworker. Errno:1
21. des. 2014, 21.00.55 mdworker[1305]: Failed to obtain sandbox extension for path=/Users/elfinn/Library/Caches/mdworker. Errno:1
21. des. 2014, 21.01.10 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe33066f0
21. des. 2014, 21.01.14 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe3106470
21. des. 2014, 21.01.15 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0f04f10
21. des. 2014, 21.01.15 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe3207780
21. des. 2014, 21.01.34 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0e1f0c0
21. des. 2014, 21.01.34 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe33104b0
21. des. 2014, 21.01.34 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0e21a10
21. des. 2014, 21.01.34 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0e152e0
21. des. 2014, 21.01.58 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.01.59 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.01.59 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.01.59 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.01.59 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.01.59 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.01.59 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.01.59 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.01.59 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.02.11 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.02.14 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.02.14 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.02.15 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.02.15 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.02.15 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.02.18 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe3107a10
21. des. 2014, 21.02.18 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0c237d0
21. des. 2014, 21.02.18 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0d2a470
21. des. 2014, 21.02.18 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.02.57 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe3105ab0
21. des. 2014, 21.02.57 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0f025c0
21. des. 2014, 21.03.00 mdworker[1320]: -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x7f8fe0f029c0
21. des. 2014, 21.03.00 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.03.00 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.03.02 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)
21. des. 2014, 21.03.02 mdworker[1318]: ImageIO: CreateMetadataFromXMPBufferInternal Threw error #203 (Duplicate property or field node)

I have a similar issue with my older MacBook Pro 3,1 since Mavericks. In Mavericks it would completely freeze. In Yosemite it reboots.
On my machine somehow it is tied to whether I have Wifi turned on or off (whether associated with a connection or not). I typically use my computer near the router and turn off the wifi. Since Mavericks if I turn off my Wifi, it will eventually crash so I have to manually disassociate but leave wifi on to keep my computer from crashing. Not sure where the [com.apple.calendar.store.log.caldav.coredav] errors fit in but I always see them shortly before a crash if wifi is off.

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!

IMac shuts down unexpectedly - Mountain Lion

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