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.

Similar Messages

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.

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!

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
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com.apple.iokit.IONetworkingFamily          3.0
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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
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com.apple.kext.AppleMatch          1.0.0d1
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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.

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

2007 iMac disk error after mountain lion upgrade

My mid year 2007 iMac was able to download ML install program, but while installing ML I got a disk error message. I was upgrading from Lion. I am still able to get to my Windows partition and boot it up without any issues.

solved

IMac shuts down intermittently

I know this is already a topic but I'm posting it because (a) nobody seems to know why it's happening, (b) the suggested causes, such as overheating, not using heat paste etc do not apply in my case and (c) the mysterious shutdowns are happening at the same time as another problem, which is that my WD Thunderbolt Duo drive keeps disappearing from the desktop and I can't help wondering whether there's a connection somewhere there, or in fact a lack of connection.
My iMac is a month old, as is the thunderbolt cable and the thunderbolt drive. The thunderbelt drive is my Time Machine drive and I keep getting messages to tell me it can't be backed up. At the moment there's no sign of it on the desktop and time machine tells me that the back up is delayed, but when I look at the "About this Mac" and select thunderbolt it tells me the drive is connected and gives me its details. What's happening? Can there be loose connections that are affecting the power supply and the thunderbolt socket?

Have you called AppleCare, using your free 90-day support? They maybe best placed to help solve the problem and you should not be having to troubleshoot anything. That said, it is possible that there may be some incompatible software causing the problems.
When the machine shuts down is it a kernel panic - screen goes dark and you are presented with a multi-language box telling you to restart. If so, post the panic log on here and someone may have some ideas:
http://support.apple.com/kb/ht2546
You could also run the free EtreCheck and post the contents of its report on here. I'm not an expert at spotting possible causes of problems, but there are plenty here who are:
http://www.etresoft.com/etrecheck
Separately, although I haven't followed the info closely, there have been many reports about problems with WD drives and Mavericks. A bit of searching on here and Google may throw up more info.

Imac shuts down when loading new music or new software

My Imac shuts down (intermittently) when loading music or software. Logic board was replaced I believe because fire wire connection was intermittently not working (1st year).
Hard drive was replaced recently (Dec 2010). Now SuperDrive and Cable (Optical Data, Flexible) was JUST replaced. But when I was on my third CD loading it shut down 3 times.
Has anyone had this problem and know of a solution?
Works fine otherwise
Apple Store has run software on it and everything seems to pass.
It seems to shut down less when firewire is disconnected (back up hard drive LaCie) but still occasionally shuts down.

I have plugged my computer in three different places over the years and have had the same problem. I have also brought the power cord with computer for work and I am assuming they would have picked that up when they run their tests on the computer.
Could it be the keyboard (never brought in) or WiFi connection (don't think they would plug in anything)? A combination of this with load software/music?
Thing is the computer works perfectly otherwise. It is only does this when loading software or music from a cd/dvd.

New iMac shuts down while downloading mountain lion update

New iMac shuts down while updating Mountain lion

Hi, any sleep settings set up, like put Disks to sleep?
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.

HT1455 iMac shuts down itself in the middle of Safe Boot progress bar loading

Hi, Im using a late 2009 iMac 21.5'' on Mountain Lion. (Originally Snow Leopard I THINK)
I got the dreaded grey screen one day and after I did more reseach i tried using the Safe Boot way.
Now Ive encountered a new problem, everytime I turn on my mac, it shows the Apple logo and the Safe Boot progress bar.
Not even reaching halfway through the bar, it just shuts down itself, every single time.. please help?
Btw, I',m using a wireless keyboard, I had to go around borrowing a windows keyboard from my friends, I dont know if anyone can shade some light if i can use wireless to do the keyboard pressing thing when it starts up?
I've also tried inserting my original OS installation disc and press C..it just shows a grey screen, then the disc got ejected, then the Apple logo with the progress bar and then shuts down itself.
Please help, I just need to go into my system one more time and backup my important datas before i go for the 1TB Seagate Replacement Program.
Thank you so much, appreciate it!

hendry17 wrote:
Is that similar with this article http://support.apple.com/kb/ht1553 on 'Instruction for backing up to an external hard disk via Disk utility' ?
No, that copies the entire drive IF it's entirely readable which you don't need, you only REALLY need is your files as everything else (OSX and programs) can be replaced)
Ds store: I read your article on creating a data recovery.
This is designed to install OS X onto a external drive, boot from it and then:
1: Attempt data recovery via normal drag and drop methods on your Users folders.
2: If the above fails, to see if the internal drive is working via Disk Utility, and/or use Data Rescue software ($100) to attempt recovery of the files themselves, bypassing the file structure and whatever is causing the problem.
3: Build your extenral boot drive of everything the way you need it, then Carbon Copy Cloner the external onto the internal drive (new or erased whatever the case may be)
May I ask you why not port powered?
Mac's have been shutting off ports that are drawing too much current, like what port powered hard drives do.
Am planning to get myself a 3TB external HDD 3,5" for all my backups in time for my AASP journey
Too large for a boot drive, you basically want a external boot drive equal too or slightly larger than the boot drive your recovering from, because later you can use it as a bootable clone backup of the entire boot drive and store it for emergencies.
These large drives like 1TB and 3TB are sometimes problematic (especially with 10.6) when formatting. Also I advise all boot drives be Zero erased before OS X is installed or cloned onto it to reduce bad sectors, a zero erase on a 3TB drive could take 6-10 hours.
If you want to use the 3TB, use it for file backup, not for your bootable clone your creating with the instructions I gave.
You see later on, once you got all your data off the internal boot drive, you build the external boot drive just like you would do a brand new erased internal drive. You add programs and whatnot, tweak it how you like. Because later on your use Carbon Copy Cloner to clone the external onto the erased or new internal drive. Get it?
So 3TB is excessive if your internal boot drive is only 500GB, you will have 2.5TB left over.
Sure you can partition, but I don't advise having so many backups on one piece of physical media, you drop it, lose it or fry it, you lost everything.
So more and seperate pieces of backup are safer in that regard, hardware and software redundancy.
Most commonly used backup methods
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

TS1599 Macbook (13-inch): Shuts down intermittently

I have been experiencing the issue described in this article (my 13-inch Macbook shuts down intermittently), but I must already have this firmware update installed, as when I try to run the package it says "The computer does not need this update." What else should I try?
NB: I listed my OS as 10.6.8, but I am about to update to Mountain Lion. I doubt that will affect this issue, however.

Try resetting the SMC
MacBook and MacBook Pro
Laptops with a battery you can remove
Shut down the computer.
Disconnect the MagSafe power adapter from the computer, if it's connected.
Remove the battery.
Press and hold the power button for 5 seconds.
Release the power button.
Reconnect the battery and MagSafe power adapter.
Press the power button to turn on the computer.
Newer Mac portables
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when

I have iMac 27. After Mountain Lion install, my trackpad freezes partially after deep sleep and need to restart to get it working again. anyone with same issue?

I have an iMac 27 and installed Mountain Lion last week. Since then, after a deep overnight sleep, certain of my trackpad functions are frozen after i wake the Mac. i need to restart the computer in order to get the trackpad fully functional. Anyone with same issue or ideas?

I'm having the exact same issue with Mountain Lion on my 2008 17" MacBook Pro. I've just tried the SMC reset, so we'll see how that does. The problem was intermittent, occuring not after every wake--from-sleep, but every few.
Interestingly, my 2007 17" MacBook Pro is also running Mountain Lion (the oldest MacBook Pro than can!), and hasn't had this problem at all.

Trying to down load mountain lion but will only get to 53.25mb

trying to down load mountain lion but will only get to 53.25mb

See if this applies:
Apple has tightened its requirements for this OS upgrade, and some older Macs— even ones that qualified for Lion — won't make the cut for Mountain Lion.
The general system requirements are straightforward:
OS X v10.6.8 or later
2GB of memory
8GB of available space
Apple also lists which models WILL support Mountain Lion:
iMac (Mid 2007 or newer)
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
MacBook Pro (Mid/Late 2007 or newer)
Xserve (Early 2009)
MacBook Air (Late 2008 or newer)
Mac mini (Early 2009 or newer)
Mac Pro (Early 2008 or newer)
Hope this helps

Do I need external hard drive to back up my iMac before update to mountain lion? My is OS 10.6.8

Do I need external hard drive to back up my iMac before update to mountain lion? My is OS 10.6.8.

First, repair your hard drive and permissions:
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. 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 installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
Second, make a bootable backup to an external drive using the Restore option of Disk Utility:
Clone using Restore Option of Disk Utility
1. Open Disk Utility in the Utilities folder.
2. Select the destination volume from the left side list.
3. Click on the Restore tab in the DU main window.
4. Select the destination volume from the left side list and drag
       it to the Destination entry field.
5. Select the source volume from the left side list and drag it to
      the Source entry field.
6. Double-check you got it right, then click on the Restore button.
Destination means the external backup drive. Source means the internal startup drive.
Third, purchase and download Mountain Lion from the App Store. Be sure you meet the requirements for Mountain Lion:
Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
     OS X Mountain Lion - System Requirements
       Macs that can be upgraded to OS X Mountain Lion
         1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
         2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
         3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
         4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
         5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
         6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
         7. Xserve (Early 2009) - Model Identifier 3,1 or later
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right.
     Are my applications compatible?
         See App Compatibility Table - RoaringApps.
     For a complete How-To introduction from Apple see Upgrade to OS X Mountain Lion.

IMac shutting down on startup - Can't enter safe mode as wireless keyboard doesn't connect quickly enough

Hi all,
I was planning to use bootcamp to install Windows 7 on my mid-2010 21.5" iMac.
Bootcamp recommended I usk disk utility to repair the drive. I had a snow leopard install disk in the drive, (I didn't realise Lion already had it's recovery tools built in to the hard drive.)
Disk utility said it can't repair the drive and recommended I start backing up my data (because the hard drive could be about to fail). Fine, so I restarted, with the intention of backing up everything (all my work for the last 12 months). So I press the power button, grey screen comes up, then the apple logo, then a progress bar appears (found this odd at first, but later found out it has something to do with disk utility and a bad hard drive) it gets to around 20% and then all power is cut from the iMac and the hard drive stops/everything powers down.
Now, I can't seem to get my iMac to boot into recovery utilities or into safe mode because it doesn't connect to the wireless keyboard in time before it shuts down. So, if I use a wired keyboard (I have a dell USB keyboard that I can take from the office), will I be able to boot into safe mode?
Also, if the disk in drive is causing the problem, then I can't remove it because the wireless keyboard won't connect/register any keypresses.

Ok so, status report:
Wired keyboard is non responsive when I plug it in before/during boot. So i guess it needs to be plugged in before the iMac shut down. That's that out the window.
Plugged in headphones and I can't hear the startup chime so don't know when to start holding buttons.
To make matters worse, the wireless keyboard is no longer paired with the iMac, getting a green blinking light which indicates it wants to connect to a computer or device.
So I can't enter any commands whatsoever, can't remove the disk in the drive or boot safe mode. It's my worst nightmare.

2007 imac shuts down intermittently mountain lion

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