Imac won't start up because of a kernel panic version 10.8.0

my 2009 intel iMac came on today with a panic error. have not been able to start up with Data Rescue. Instructions just say to restart, but I get the same thing over and over. Get the chimes and then the wjite apple screen, and then what looks like terminal mode. Have tried starting up with command d, but nothingg happens. Using a 3rd party wirless keyboard. Could that be part of the problem.
Thanks for your help.

Same problem here with a MBP. Although it doesn't happen every time, and I don't think it actually goes to sleep since the last time it happened I noticed the apple on the back of the screen was still lit.
Up to now I've repaired permissions and reset the PRAM, and it seems to be ok so far. But I haven't kept my MBP on for hours like I usually do.

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Installed Yosemite...now my MacBook pro won't start up. Keep showing "Kernel Panic!" HELP!

installed Yosemite and now my MacBook pro won't start up. Keeps showing "kernel panic"
PLEASE HELP ME!

If you can't start up and log in in the usual way, try in safe mode.
During startup, you’ll see a progress bar, and then the login screen, which appears even if you normally log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Log in as an administrator to carry out these instructions. If you have only one account, you are the administrator.
☞ If you don't see any reports listed, but you know there was a panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.
Safe mode is slower than normal, and some things won’t work at all.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t start in safe mode.
If you're able to log in, 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.
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 panic report has a name that begins with "Kernel" and ends in ".panic". Select the most recent one. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.
I know the report is long, maybe several hundred lines. Please post all of it anyway.
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.

Mac Pro - crashed and now won't start up, stripes on screen + kernel panic?

My computer apparently crashed while the screensaver was up (I was away for 10 or so mins, just Firefox and World of Warcraft in windowed mode running), as it was showing a black screen with a fuzzy whitish line along the top and was completely unresponsive. Unusual, but nothing to freak out about.. right?
So I did the on switch turn off/turn on routine and as soon as anything shows on the screen, I've got these black + white horizontal bars/stripes along the top 1/4 of my screen. The Apple Logo and the spinning progress bar have little fuzzy red spots on 'em. That's when it's time to freak out, as we're in "my computer done broke itself" territory. A few seconds of fuzzy progress bar and we get the wonderful "You need to restart your computer" message.
Fine.. restart.. same thing.
Reset the PRAM and SMC. Same thing.
Can't start up from external disks.. it just gives the same stripes + message.
I'm running a detailed hardware test (the hardware test loads but with the same stripes at the top and annoying blue/red vertical ones in the background to boot), and it's been running for about 80 minutes and is only 60% of the way through.
Anything else I can do, or do I have to drag the heavy thing to an Apple store and leave it there for a month? How in the world does a computer go from "working fine" to "completely broken" in 10 minutes?

More details:
The regular/non-extended Hardware Test returned no problems, despite taking hours for what was supposed to be a 3-5 minute test. I haven't dared run the extended.
I also tried removing third-party RAM and using the original configuration, then just the third-party and no Apple, etc.. It's not the RAM, as the problem is exactly the same.
I'm going to call up Apple support when I can, but just looking for other things I can check or possibly do until then, or just insight on what the problem could be.
Is it most likely the graphics card? Could it be an issue with the core hardware?

IMac won't start up passed the grey screen

Last friday my iMac (late 2006, 24", 2.33 duo core Intel, OS 10.6.8) gave me the spinning beach ball.
Restarting resulted in: first the apple screen with the progress indicator, followed by grey screen..
That was it. It hangs at the grey screen.
I've been busy this weekend testing all kinds of ideas to get my imac to fully start up again.
I checked the RAM, it's fine.
I flushed NVRAM, wild guess, but nothing changed.
Starting up in safe mode doesn't work.
Starting up in recovery mode doesn't work.
On the upside, I was able to start my imac up in Target mode. Using the host computer and Disk Utlity I can see there's nothing wrong with the HD. All the data is still there!, so later today I'll make a copy of the complete HD, hoping/thinking that I won't copy whatever is wrong.
I had Disk Utility repair all the permissions.
I've used the host computer to reinstall the OS on my imac.
But on start up my beloved iMac still won't get passed the grey screen.
I'm thinking something goes wrong before my Mac even gets to the HD. Maybe it's the firmware, but I'm not really sure that firmware matters in this case. And I wouldn't know how to reinstall the latest version of firmware because my imac won't start up from it's disk drive
I'm thinking maybe something could be wrong with the graphic card's RAM, though on start up I can see the apple logo just fine.
I'm not able to start up from CD, I've tried that because I wanted to reinstall my OS (before I figured out how to do that in Target Mode) by putting the OS disk in my imac's own disk drive. Staring up with the C key still gets me the grey screen. Staring up with Option key shows no other option but the HD.
So is there anybody out there who has an idea that could help me further along?
Any help is greatly appreciated!
Frank

Hi Jan,
If you have another firewire Mac you can check if the HD of your Mac is OK by connecting them with a firewire cable and use target-mode. That way I found out my HD was just fine.
It also offers you the chance to run a diagnostic program to check if anything else is fine. I used TechTool to do that. But everything checked out fine.
In the end I decided the problem is probably hardware. Some electronic part that broke. Very frustrating that some small transistor or so is keeping me from using my otherwise fine iMac.
I contacted a repairshop that also works for the local Mac retailer. They told me my iMac was concidered 'classic' and therefor it wasn't economically not worth the trouble trying to repair it.
I gave up, took two weeks to mourn the loss of my beloved iMac, and bought a Mac mini.
FrankV
Judging by your name I'm guessing I could've anwered this in Dutch.

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My 24" iMac won't start up/restart if my iPod is already connected to it. If I restart with the iPod connected, I just get a gray screen (with no apple logo) forever. Has anyone else experienced this problem? If so, any solution? I have Windows installed with boot camp, don't know if that's the problem, but I tried reseting the p-ram, but to no avail...
Intel iMac 24", 7600 GT, 500GB, 2GB. Titanium Powerbook 667 MHz G4, loaded. Mac OS X (10.4.7) 30 GB iPod Video

My suggestion would be disconnect the iPod. That's just me though.
http://docs.info.apple.com/article.html?artnum=93953
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Imac won't start white screen apple icon spinning gear

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Hello rameta,
It may help to reset your Mac's SMC and PRAM.
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
Reset your computer’s PRAM
http://support.apple.com/kb/HT1379
Cheers,
Allen

After installing update, iMac won't start up

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Start up in safe mode. Hold the Shift key while your Mac is starting and check that you can start up in safe mode. Then, choose all the items you want to transfer in Desktop by pressing Command and A keys, and move them to the external drive.
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Recently my iMac won't start up - it goes to screen with folder + question mark. I've run Disk Utility, repaired hard drive, but there were no reported repairs to make.
Occassionally it will start up, and everything seems normal until suddenly the beach ball appears and everything freezes. 99% of tries it won't start up (i get the ? folder). Is it worth erasing the disk and reinstalling everything to see if a fresh start will help, or is it likely that the hardware is damaged?
Don't want to bother erasing it if there's no point... any advice greatly appreciated.
Also - anyone who's had their iMac repaired - what are the costs like?

I've just suddenly had the same problem - for no apparent reason as far as I can tell. The night before last I switched off my iMac as normal, and yesterday morning switched it back on. At first it would start, but crashed as soon as I tried to start any applications. Then it wouldn't start at all, and just got as far as the gray screen with the apple on it. After trying resetting the PRAM, switching on and holding the on button for 10 seconds, it was no different...
So, I tried doing a archive-reinstall from the original leopard DVD I bought from apple. This did a successful disk verification, but then said it couldn't install mac os due to a problem with the basesystem package. After that it wouldn't let me try another archive-install and only gave the options to install as new, or erase and install. The latter I don't want to do, and the former just gives the same basesystem error... All I get now is a flashing folder with a question mark and not even the gray screen...
I have tried using the diskutility to verify/ repair the hard drive and it says all is well...
I have heard this may all be due to dodgy RAM chips, but I have never messed with them or altered them. It just seems odd they should suddenly fail when they were working fine before.....
Any ideas would be much appreciated. A lot of data at risk
Dan.

IMac won't start without install disc

Hi, I'm new to all of this. I tried resetting my admin password using install disc on my iMac as I'd forgotten it. Now iMac won't start without disc. If disc is ejected on restart apple logo flashes between no entry sign and folder with "?" on it. Will start up with install disc in, but then wants me to choose language and install OS. Tried repairing and verifying HD and all seems ok. Tried holding option key and selecting HD on startup, but same outcome - choose language and install OS. How do I get back to normal desk top? Do I have to install OS again? Will I lose data? Please, please help! Thanks.

It should only take a minute or so at most to boot from the DVD.
If your sure you have the correct Install Disk for that iMac, I'd start over. Then if it still doesn't work then perhaps a trip to your Local Apple Service Provider with the Disk or Disk and iMac is in order.
http://www.apple.com/buy/locator/service/
Alternately using the correct Disk as per the following article, see if you can run the Apple Hardware Test? > http://support.apple.com/kb/HT1509

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Imac won't start up after long time 'frazing' of Firefox. Manual start up ended up in the grey screen forever'processing' icon.
Had a look at other solutions, unable to enter safe mode. Someone mentioned to try single user mode and it went through half way with error messages on the screen which has no command line available for me to key in any letter.
My Imac has been out of warranty coverage for a while, how do I know if it's hard ware problems before paying for service?
Any help would be appreciated!
Alice

Yes, I have backed up and deleted old files using target disk mode with an old macbook. It's just the larger files I didn't have enough space and disks for. I really appreciate your help on this as I've never had any mac issues before this so am not really sure what to look for.

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Got a new intel iMac. Gave my husband my old G5 iMac (not intel). It was working perfectly. For some reason unknown to me, he decided he was going to reinstall everything from scratch so he grabbed the first disk he saw and put it in the computer. It was the startup disk for an intel computer & NOT for the iMac G5.
Did he fry the computer? It won't start up. Keypad & mouse won't respond.
The screen can't find the driver (no surprise) and says "panic: we are hanging here...." I can't get the disk out of the drive. Service contract is up. Is there a way I can connect my laptop to it and get it to respond & spit out that intel disk? Perhaps if I open the cover up, I can into the CD drive and get the disk out. All ideas appreciated.

Quote
J.C posted "Re: G5 iMac won't start! Help needed." on Feb 4, 2008 4:53:20 PM.
Hi Mel Kev
Have you tried holding down the left mouse button when you turn the computer on. Holding down the left mouse button should force eject the disk.
Hope this helps
J.C
UNQUOTE
And it WORKED! (I really wasn't in the mood to do surgery on the computer this evening). Thanks all!!! You are awesome!
Now, if I can just find the original installation disks.... They are in this drawer somewhere....

Intel iMac won't start - HELP!

My iMac won't start this morning. I get the white screen with the grey apple,
and the swirling progress thing, then after a few seconds I can hear
the sound you hear when the system shuts down. like a soft switch
going off, then it just continues swirling, still with the white
screen and grey apple, then it restarts by itself. Then we go through
the same routine. Tried booting up by holding C with the Leopard disc inside but nothing happens.I have just reinstalled Leopard as Snow Leopard left too many printers and programs lifeless, so I did an erase and install a few days ago. Since then I have used the Mac fine, switched down normally last night, but this morning it doesn't want to play.
Any thoughts?
Thanks in anticipation
Chris
Message was edited by: ChrisRR

Have you reset PRAM and SMC?
Do this first
http://support.apple.com/kb/HT1379
and then do this, if the PRAM does not help
http://support.apple.com/kb/HT1543
The second one is basically disconnecting your iMac from power (and all cables), then reconnecting following a precise procedure.
If that does not help, I would restart with the Snow Leopard installation disc (insert disc and start up with the C key held down). You probably did an installation of Snow Leopard over your existing Leopard system the first time. This time, erase it completely first, then install Snow Leopard. I assume you backed up your data already.
When you get to the Installer screen (after selecting language), go up to the menu bar. Under Utilities, select to run Disk Utility. In the sidebar, select the internal DRIVE, not the volume indented under the drive. Go to the Erase tab. Name the volume +Macintosh HD+ and set the format to +Mac OS Extended (Journaled)+. Erase the drive. Since you have the drive selected in the sidebar (not the volume), it will also re-partition the drive.
It should take less than on minute to complete the process. Quit Disk Utility to go back to Installer. Run the standard installation onto the blank internal drive. Hopefully, a fresh Snow Leopard install on a reformatted/re-partitioned drive will work better for you.

IMac Won't Start Up/Boot

My iMac won't start up. I've tried holding all kinds of key combinations while I turn it on, but it doesn't even get that far. It gets stuck on a folder with the Apple picture alternating with a question mark. It doesn't do anything else for a while, and then the fan turns on (???).

This is indicative of a corrupted system or drive. The first thing to try is:
Repairing the Hard Drive
Boot from your OS X 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 Installer menu (Utilities menu for Tiger.) 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, then quit DU and return to the installer. Now shutdown the computer for a couple of minutes and then restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) 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.
If this doesn't solve the problem then you will have to reinstall OS X. If the drive tests out OK per the above then you can reinstall without erasing the hard drive:
How to Perform an Archive and Install
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.
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Imac won't start up because of a kernel panic version 10.8.0

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