IMac won't boot past grey startup screen

It's a 2008 intel iMac running ML and bootcamp with Win7
It was working fine yesterday then I tried to start Aperture. It bounced on the dock but wouldn't open.
I tried a restart and it just gets to the grey startup screen with the Apple logo and spinner
I can start it from an external drive and I just tried to start from Bootcamp and it starts and runs fine
I have repaired and verified the disc and it says it is fine
Something is stopping it booting into ML
Any ideas?
Allan

Thanks, I already tried most of those. I followed the other suggestions ( already failed safe boot) and when it got to " take it to Apple" I just restored it from Time Machine and it all works perfectly.
It would have been nice to fugure out why it wouldnt boot, something must have been corrupted.
I dont know if its anything to do with it, but when I got the restored system booted up and downloaded all my emails, there was an email in my outbox with no recipient field filled in but a link to some iffy website in the message field.( Something like burnt gate)
I deleted it.
Maybe my first Mac virus?
Allan

Similar Messages

Help: iMac won't boot past Grey logo screen with spinning lines

My fiance's iMac (intel based) running snow leopard (upgraded from Leopard a couple months ago) will not boot past the logo and spinning lines. This started after at attempting to restart after installing updates to Safari and iTunes.
When booting in verbose mode I get these lines:
Launchctl: Dubious permissions on file (skipping): /Library/LaunchDaemons
Launchctl: Dubious permissions on file (skipping): /System/Library/LaunchDaemons
Launchctl: Dubious permissions on file (skipping): /etc/mach_inid.d
AppleYukon2: Marvel Yukon Gigabit Adapter 88E8055 Singleport Copper SA
AppleYukon2: RxRingSize <= 1024, TxRingSize 256. RXMAXLE 1024, TXMAXLE 768, STMAXLE 3328
Then it just stops and does nothing.
I've unplugged everything except the apple keyboard and mouse. Ethernet is not connected.
She doesn't seem to have the original disc that came with the computer, but I do have the Snow Leopard upgrade disc.
What do I do? It won't boot in Safe Mode either, freezes at the same spot.
I'm not a particularly savvy Mac user as I recently embraced them when we moved in together.
Any help would be greatly appreciated

Repairing permission is not the first answer. Should try to run fsck and reset the PRAM
Start up your computer in single-user mode to reach the command line.
Note: If necessary, perform a forced restart as described in the Emergency Troubleshooting Handbook that came with your computer. On desktop computers, you can do this by pressing the reset/interrupt button (if there is one) or holding down the power button for several seconds. On portable computers, simultaneously press the Command-Control-power keys. If your portable computer doesn't restart with this method, you may need to reset the Power Manager.
At the command-line prompt type:
/sbin/fsck -fy
Press Return. fsck will go through five "phases" and then return information about your disk's use and fragmentation. Once it finishes, it'll display this message if no issue is found:
** The volume (name_of_volume) appears to be OKIf fsck found issues and has altered, repaired, or fixed anything, it will display this message:
***** FILE SYSTEM WAS MODIFIED *****
Important: If this message appears, repeat the fsck command you typed in step 2 until fsck tells you that your volume appears to be OK (first-pass repairs may uncover additional issues, so this is a normal thing to do).
When fsck reports that your volume is OK, typerebootat the prompt and then press Return.
Your computer should start up normally and allow you to log in.
Resetting PRAM and NVRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Your computer's PRAM and the NVRAM are reset to the default values. The clock settings may be reset to a default date on some models.

IMac won't boot past grey logo screen

20" iMac was acting very slow, to the point where I would get the rainbow ball if I opened the HArd Drive icon.
Revolted but couldn't get past the grey logo screen and spinning wheel. Tried a Disk Repair from the Snow Lep disc but it just froze up.
I restored from my Time Machine drive and 24 hours later it's still the same. Getting ready to bring it to the genius bar unless anyone has an idea!

HI Rob,
Check to see how much space is available on the startup disk. Right or control click the MacintoshHD icon. Click Get Info. In the Get Info window you will see Capacity and Available. Make sure you always have a *minimum of 10% to 15% free disk space at all times.*
If your iMac freezes before you can view that information, boot from your install disc like you did with disk repair only this time look at the bottom of the Disk Utility window. You'll see Capacity and Available.
Since you can't boot from the install disc, you could try booting in Safe Mode
If you can boot into Safe Mode, launch Disk Utility from the Applications/Utilities folder. You can verify the startup disk in Safe Mode, but you can't repair in Safe Mode but at least you'll know if there's a problem with the startup disk.
Carolyn

Another G5 iMac won't boot past grey Apple screen!! HELP!!!

Last night I tried to put my iMac to sleep. it took about 3 times, and it finally went to sleep. Today I tried to wake it up but I got the little spinning disk, and it would not wake up. I could not restart it from the screen, so I pulled out the power cord as I have had to do a few times in the past with no problems. Today when I plugged it back in it got to the grey Apple screen, but no little progress circle. I waited & waited, nothing happened so I cycled power again. This time I got the progress timer circle, but again after about 20 minutes nothing happened. I then put the install disc in and booted from that. Tried verify disc, but it failed saying it could not un-mount the volume. Tried verifying permissions, but it seemed to get stuck with just a fraction left on the progress bar, so I quit & tried again (basically where I'm at now). I have also noticed that if I choose the "start up disc" (while running from the disc) the only thing that shows in a network icon. My HD does not show up as an option. For about the past 5 months I have noticed my HD has been a bit noisy. Kind of a whirling sound that seems to get louder then quiet down & repeat....not real loud, but loud enough so I have noticed it. I have been worried that something like this might happen.
update: while repairing permissions I just got a "Disc utility error" says Disc utility has lost it's connection with the disc management tool and cannot continue. Please quit and relaunch Disc Utility. This is the same message I got the last time I tried to run it. I also have an OSX Leopard install DVD...should I be starting from that disc, or the install disc that came with it? If I should be using the newer disc, how would I get the other disc out of the machine?
So....am I up the creek with out a paddle, or is there anything I could try?
any advise would be greatly appreciate as ALL my data is on my iMac and not this POS PC I have to use now.
Thanks,
Jeff

Using Target Disk Mode is an excellent, idea, you should be able to drag your data on to the new machine.
Let us know how you made out,

My iMac won't boot past grey screen and it didn't come with a os x disk

My iMac won't boot past grey screen with apple. I've tried booting in safemode but that didn't help and my iMac didn't come with a os x disk.

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.”
b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use either of the techniques in Steps 1b and 1c to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
Start up in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 10. If you ever have another problem with the drive, replace it immediately.
If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
Step 9
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 10
Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
Step 11
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 12
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

G4 won't boot past grey apple screen

Hi. I have been having the same issues with my G4 15". I'm frustrated. The whole thing started with stalling during applications. So I decided to reinstall my OS X 10.5. After reinstall, I copied my saved files from my "My Book" drive back to my hard drive. Stalling issues returned. I reinstalled again. still had some stalling issues, so I performed disk utilities. I repaired permissions. SMART status is verified. System still ran extremely slow. So, I followed directions on apple support for resetting the PRAM and NVRAM. After I did this, the computer won't boot past the grey apple screen. I have reset the PRAM and the NVRAM again. Still nothing. I rebooted up from OS install disk. I performed disk utilities repairing permissions and repairing HD. I did this for both my drive and the computers drive. I choose restart and again the grey apple screen. I have been trying to get this thing going for a week now. I'm near tears. Cornelius or anyone, can you help me? It says no errors are found, SMART is verified. But I can't get the computer to boot unless it is from the CD. Is the computer confused on where to boot from? Or is it shot? HELP ME PLEASE, before I play frisbee with my dear beloved mac!!!! It seems like this ALL started happening after I installed the update 10.5.8. I had ZERO problem prior to any software updates!!!

There have been report of some external drives/enclosures that do not work as a boot device. Not sure if the MyBook is in that category or not, just make sure that there is nothing else plugged into the Powerbook then try again.
Does the WD need its own power to be plugged into an AC power source? Try the other firewire port
I have one more question for ya... You were able to load OSX on this EHD using the OSX install disk in the Powerbook? And the installer saw the EHD with no problems?
If non of the above works try booting while holding down the x-key, this should force it to look for an OSX volume, not sure if it works the same on an EHD but worth a shot.

Won't boot past grey logo screen

I have a refurb dual 2Ghz powermac G5. New in March 2006.
It will not boot past the grey logo screen. I have tried all of the regular stuff: reset pram, reset nvram, reset-all, pushed the PMU button, etc, unplugged; reset ram; removed and reset ALL cards/memory. And nothing.
When trying to boot in single user mode, it freezes when almost getting to a prompt.
I CAN boot to open firmware. Though booting from the OS X install cd yields the computer to freeze at the grey logo screen.
I am dual booting Gentoo Linux, and the curious thing is that if I select Gentoo at boot, the computer freezes when loading the kernel for Linux.
So it's not an OSX thing it seems like; probably hardware.
I ran the 40min extended apple hardware test from the PMG5 OS X disc which passed everything with NO errors.
I then booted the disc in target mode with my iBook, and repaired permissions: it said was all okay, nothing to fix.
I removed the battery, and placed it back in. The battery tests fine with my voltage meter-tester.
I am a PC technician, but am stumped in trying to get my powermac to boot. Let me know if you have any other ideas. Thanks,
Dual 2Ghz Powermac G5
1.5GB ram
stock Radeon 9600
stock 160GB hard drive
airport card
Dual 2Ghz Powermac G5 Mac OS X (10.4.6) Logic 7.2 Gentoo PPC

Okay my powermac is at the local mac repair center. All hardware checked out okay; the tech is unsure of the issue. He's pulling parts and going to see what part is failing. He thinks the power supply is freaking out and sending out too much voltage, causing the computer to freeze at boot.

MacBook Pro won't get past grey startup screen

I have a late 2011 15 inch MacBook Pro running Mavericks. Around a month ago, maybe more, it began to sometimes completely freeze or just turn off while Inwas using it. Sometimes it would start up again, sometimes it wouldn't and would beep three times. Eventually it wouldn't start up at all and would just beep. I started it up in recovery (holding command +R) and ran a disk repair, it said the disk couldn't be repaired. I had it backed up on Time Machine so I replaced the HD and restored from Time Machine. It was fine for a couple days after that, then the old symptoms returned. I took the RAM out and replaced them with some RAM of the same size (2 chips, 2GB each) taken out of a Windows laptop that I had. Again, it was fine for a few days then started turning off and beeping. Then it would turn on but not boot up, i.e. get stuck on the grey screen with the spinning circle. I tried booting in recovery, booting into safe mode, holding option and choosing a disk; in all cases it would just stay stuck on grey screen with the spinning thing. I tried PRAM and SMC reset, no result. At one point, it got through boot up in safe mode but took like an hour to do so. I restarted from safe mode and it took another hour and booted up normally. Then it turned off again and wouldn't turn back on. I opened it up, reseated the RAM and cleaned he fans, which were filled with dust and build up. It turned on and ran normally for a couple days in which I wasn't doing much on it, just watching stuff on VLC or reading, so not really using it and clicking and stuff. Next day, I open it (from sleep, it hasn't been shut down at all since I got it to run again), and try to open Firefox and actually work; it keeps freezing and being incredibly slow, to the point where it was totally frozen and I couldn't force quit or anything. So I held the power key to shut it down; since then it's back to not getting past the grey screen, even when I leave it for over an hour. No idea what to do, anyone have an idea? Thanks in advance.

You have to use Mac specific RAM chips.
You have to buy new RAM modules, I guess.
If you have extended AppleCare, contact Apple.
Best.

My emac won't boot past grey loading screen with apple and spinning disk

I tried starting it up and it does the usual except when it gets to the grey screen with the loading disc and apple, it does nothing else. I dont have access to an install disc and even if I did, the tray doesn't even open. Please help!!!

Do you have the Install Discs for this Mac?
Might be time for a relatively painless Archive & Install, which gives you a new/old OS, but can preserve all your files, pics, music, settings, etc., as long as you have plenty of free disk space and no Disk corruption, and is relatively quick & painless...
http://docs.info.apple.com/article.html?artnum=107120
Just be sure to select Preserve Users & Settings.
But with that loginwindow crash, we may need to trick it...
Reset OS X Password Without an OS X CD...
http://theappleblog.com/2008/06/22/reset-os-x-password-without-an-os-x-cd/
Admin Hack...
http://www.hackmac.org/?q=node/4
Starts up like the first time you buy a new Mac, but after filling in all that info again, you should have access to the computer and the other Users & files will still be there... give the new User a different name than an existing one.

Reset PMU and Powerbook won't boot past the blue screen with "Mac OSX" box

Hi-
Problem: I tried to reset my PMU, and now when my computer restarts it won't go past the blue screen with the "Mac OSX" logo in the box (and progress bar, that never fills up). I then also tried to reset PRAM, but it still won't boot properly.
Backstory--
I've had my 12-inch Powerbook G4 for about 3.5 years already, so things are starting to get a bit out of whack. I replaced my battery about 3 months ago, which has been great, but recently my power-cord has been wonky (having to unplug it and replug it in to make sure it actually charges the computer, the light flickers on and off, etc). Today it actually started producing SPARKS at the place where the thin white wire meets the white plastic power brick, so I decided it was time to get a new one. Brought it home, plugged it in, and since it seemed like the battery indication icon on the menu bar was all out of sync with the powercord colored-light, I tried restarting it a few times, but still the same. Then, I decided to reset the PMU, which may have been a huge mistake. And now it won't boot past the blue screen... Any advice? I'm going to try restarting it in "safe" mode, but I'd be so grateful for any recommendations. Hope I haven't done something irreversibly stupid with the PMU reset.
Thanks,
Samantha

Hello all,
Thanks for all of your great suggestions and info-- here are a few responses.
1) The disk I just borrowed from my friend appears to be the full retail version-- it looks just like the links that Ali B sent, and is in a large box saying "Mac OSX Tiger, version 10.4"... will this be the proper disk to do an Erase and Install? The only other disks I have came with my Powerbook when it was originally purchased, when it came Panther (I think, 10.3?). Would I use both sets of these disks to do erase and install? Or only the Tiger OSX disks?
2) I get the sense that Disk Warrior or Tech Tool might be necessary, but does it make sense to TRY to do erase-install before buying them? Also, are there any downloadable (for pay) versions of this, or would I need to track down the actual physical disks in Hong Kong or wait for them to be shipped?
3) I haven't yet tried the S.M.A.R.T. test, should I do that first? What is the procedure? Are there any results or ways to know if the drive is too far gone (so that I might instead replace the internal hard-drive) instead of pay 100 USD first to do the disk repair?
4) Cornelius said: "An alternative would be to completely reformat and erase the entire HDD, then re-install and restore your data from backup. If your backup is in the form of a bootable clone of the entire HDD, you can just clone it back." I use Super-Duper to back-up and the most recent one copied the whole thing-- what would be the later procedure of "cloning it back"?
5) As I'm able to use my computer pretty normally right now, but does it still mean that it might crash/die at any moment? Is there any way to tell?
Thanks so much!

G5 won't boot past grey screen

G5 2.0 Dual will not boot past grey screen. Running 10.5.8 on an old maxtor 160gb drive, drive is available as a startup disc in StartUp disk in system preferences. But when it is chosen the machine shuts down in the usual manner then switches to the maxtor disk and only gets to the grey screen with the apple log no progress clock appears. Using disk utility from install disk reports that drive is ok, running techtool pro 4.6.2 reports the drive is fine and all file structures, volume structures and directories are fine. So of course i am keen to find out what the issue is and wether it can be resolved without resorting to a clean install. When booted from another internal drive the icon for the errant drive is visible and all files and folders are visible and readily accessable.
It would be great to get back to booting from this drive as it is the main drive I use and has so much more on it than the secondary drive.
Any help will be of immense use
Thank You

I assume you have already tried a PRAM reset. If so, then the following three items may yield a clue.
Number one thing to try is a Safe Boot by holding the shift key down at boot. You may have a something in the non-minimal Apple kext set that is causing the hang. (If it safe boots, you may have a problem in kext caches which can be cleared. See below.)
Second is to disconnect all peripherals except monitor, keyboard and mouse and see if something there is contributing to the hang.
Third is to use verbose boot (hold down cmd-V at boot until you see a black Unix terminal screen come up) and see where the system is hanging.
Clearing the kext Caches (if indicated)
This is probably easiest done booted from the other drive, so I'll describe that method.
Open the Maxtor's System folder, then open the Library folder and drag the following two files to the trash:
Extensions.kextcache
Extensions.mkext
Empty the trash.
Open a Terminal session from the Terminal application in the /Applications/Utilities folder.
Type cd followed by a space in the command line and then drag the icon for the Maxtor into the window, which will put a properly formatted Unix path into the command line, then press the return key. Type the following three commands
cd System <cr>
cd Library <cr>
sudo touch Extensions <cr>
then give your password when requested and close the terminal session. Select the Maxtor as the statrup drive in System Preferences and give it a go.

Powermac G4 (OS 10.4.11) won't boot past grey apple

1- My PowerMac G4 (running OS 10.4.11) won't boot past the grey screen with the apple. Any suggestions?

I found somewhere else how to hold down the mouse on starting, which opened the tray. I was able to startup with the disk, holding down the C and get to the Disk Utility window. Tried repairing the disk, but got this message:
Fist Aid failed:
Disk Utility stopped verifying "Macintosh HD" because the following error was encountered:
The underlying task reported failure on exit. <OK>
and in the info window it says,
"Verifying volume "Macintosh HD"
Checking HFS Plus volume.
Catalog file entry not found for extent
The volume needs to be repaired.
Volume check failed.
Error: The underlying task reported failure on exit (-9972)
1 volume checked
0 HFS volumes verified
1 volume failed verification
Sounds pretty ominous! Of course, the recommendation is that I backup everything , but how can I if I can't get to the desktop to back it up? (It hasn't had a lot of use for sometime, but is available as a film scanning station, and so that I can access scanned images on my iMac. I doubt that there is a whole lot on the drive that isn't backed up, but I would prefer to back it up for sure!)
Thank you again.

Macbook won't boot past main apple screen

I was using my computer this morning (13" black Macbook that I've had since December) and it was working fine until I closed it to go get something to eat.
When I got back and opened the lid again, the screen was black, as if it was off, but I could make out the outline of the Apple logo in the centre. So I turned it off, gave it some time and turned it back on. Now it won't boot past the main Apple screen, where the little timer thing spins and spins and spins while apparently nothing else happens.
I left it alone for a couple of hours, thinking maybe it was overheated, but that didn't make a difference. I tried taking the battery out and restarting it, but that didn't work either. I called Apple, but my parents opted for Future Shop's warranty instead of Applecare, so they told me to search the website as "the issue is well-documented," since I have no tech support with them.
I've searched around to see where this is posted or if it's been answered a billion times before, but it's 35C in here, and my rage/frustration are ruining my ability to be rational, haha.
Anyone experienced this before / is there a resolution that doesn't involve me being without my computer (which is like sweet, sweet crack to me) for an undisclosed amount of time?
Thanks in advance,
Emy
Oh, and I'm not sure about the operating system version beyond that it's OSX and I regularly install whatever updates they tell me to.

Maybe Disk Utility can repair the disk this way:
-Search your installation DVD's.
-Insert the disc 1 and sthut down your Mac
-Start your Mac again while holding down the C key
-Now your Mac should boot from the CD, this can take some time.
-After a while you will see a installation screen where you can chose a language.
-Chose English and continue.
-Then click some time's next and agree with the "Software Agreement".
-Open Disk Utility. Top menu bar --> Utilities --> Open Disk Utility.
-Select your hard disk in the list of disks and volumes on the left side
-Go to the First Aid (tab somewhere on the right).
-Click the button to verify the permissions.
-Then Click the button to repair the permissions.
-Click the button to verify the disk.
-Then Click the button to repair the disk.
-Exit the Disk Utility

IMac (early 2008) won't boot past grey screen and has lines going vertical.

I have an early 2008 iMac that won't boot up past the grey apple screen. I've tried booting from the install CD to no avail and it also will not load my windows partition (boot camp). I've reset all the things I think I can reset and also tried starting in safe mode with no luck. Has anyone experienced this before and if so, how did you fix it?? I suppose I should note as well that the ram has been upgraded to 4gb (myself). It worked great for quite a while then I periodically got the lines along with a frozen screen but usually a restart fixed it. I'm up against a wall with it now and short of taking it in to the genius bar (closest one is almost 3 hours away) I don't know what else to do.
Any thoughts?
P.S. I've attached a picture of the lines. It gets to here and then freezes.

I suppose I should note too that when I try to boot from the CD, the screen dims and tells me to restart after a minute or so.

Macbook Pro won't boot past grey screen with Apple logo and then shuts off

This is a long story...
This morning, I would turn it on and it'd go to the grey screen with the Apple logo for a few seconds and then go to the icon that is a circle with a line through it. After reading online, I was able to boot it up in Safe Mode. I messed around a little bit in system preferences thinking I could fix it on my own, not really knowing what I was doing (I'm a *******). I went to Startup Disk in Preferences. I chose the MAC OS X, xxxx and then clicked the lock to prevent further changes and then clicked restart.
Now when I turn on the macbook, it goes to the grey screen with the Apple logo for at least two-three minutes and then just shuts off. Won't boot into Safe Mode now. Please help. I already tried the Command-Option-P-R keys trick like five times.

If you have a full retail DVD for 10.6 you can boot from that by holding the C key during startup...but you will then be in install mode if that is what you want to do. At least go ahead and see if it will boot ok from the 10.6 disk and then you can decide what you want to do further.
Apple does not have 10.5 for sale anymore from what some other users have said on here so if you want to go that route you will have to find a copy for sale such as from eBay or one of the Mac resellers.
Before taking the machine to someone, try booting from 10.6 and see if that works...that way you can narrow down problems the machine may be having.

IMac won't boot past grey startup screen

Similar Messages

Maybe you are looking for