G5 dual 2.7GHz refuses to get past the grey apple logo screen no matter what I do!

Hoping that someone might be able to help, as I think I have tried pretty much everything and I’m running out of ideas now!
It’s a G5 dual 2.7GHz that refuses to get past the grey apple logo screen no matter what I do!
everything passes the extended apple hardware test (2.5)
3GB of RAM (2x1GB brand new from crucial)
won’t start from a original OS 10.58 disk
passes disk utility when connected to another mac via FW target mode
nothing other than keyboard/monitor attached
all of this done; http://support.apple.com/kb/TS2570
tried alternative HDD’s without any joy
won’t safe boot
stays at the grey apple logo screen and the fans then start revving up excessively
Any other suggestions or advice very gratefully received!

BDAqua wrote:
Seems strange that it's trying to invoke "AppleIntelCPUPowerManagement" on a G5, but maybe it's all inclusive???
Though it exists on my Universal 10.5.8 Install, it does NOT appear to be a loaded extension....
/System/Library/Extensions/AppleIntelCPUPowerManagement.kext
BD, is that showing up in your PM's extensions folder? I wouldn't expect to see it loaded in a PM, but I wonder why the installer loads it unless the 10.5 installer loads a system that could boot an Intel, too, when it installs on a PM. (I read somewhere this weekend that an Intel will actually boot from an APM formatted disc as well as a GUID formatted disc) Curious.
I recall seeing yesterday or Saturday on one of the discussion threads someone having that extension show up in a verbose boot on a PM that was having problems booting into Leo. I think I advised trashing the kernel caches and touching Extensions in that one, but it is puzzling that it shows up here as well.
This is the other discussion: https://discussions.apple.com/message/15161427#15161427

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I had been away on business for a few weeks and yesterday I decided to run the latest updates for my powerbook. In the middle of it the computer froze for what I think is the first time since I bought it 2 years ago. I ended up having to shut the computer down with the power button. When I turned it on it wouldn't and still won't advance past the grey apple logo screen with the progress indicator. It just sits there for hours on end if I let it.
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Booting in safe mode I get the same result.
Zapping the Ram
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joeuu, thanks for the reply. i checked the airport and the ram and both seem to be seated properly.
i ran the quick hardware diagnosis and it came back showing everything was fine.
when i ran the extended one i got more progress than i did the first time. it got to the RAM diagnosis (about 6:45 seconds in) and then froze - i let it sit like this for an hour and a half to make sure it was actually frozen.
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Have you tried booting with the install disc that came with your computer?
Find it and then run Disk Utility to verify your hard drive. If errors are found, try to repair the disk.
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I can't get past the grey apple screen trying to boot up with Mavericks. I had been using Mavericks for about a month (only had issues of freezing occasionally). I read in one of the posts here that I should try holding command R down when booting. I did now I just get a grey screen without the apple. Any advise?
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Hello ther cnickers,
It sounds like the initial install of Mavericks went ok, and you have been using it for a while, but now cannot boot to your desktop and are stuck at a gray screen with an Apple logo. I would recommend a couple of things here:
First, try performing a Safe Boot to see if that will load up for you. If so then leave Safe Boot and restart from the Apple menu to try and get to your deskop:
To start up into Safe Mode (to Safe Boot), follow these steps.
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key.
The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple logo and the progress indicator (looks like a spinning gear).
After the logo appears, you should see a progress bar during startup. This indicates that your computer is performing a directory check as part of Safe Mode.
To leave Safe Mode, restart your computer without holding any keys during startup.
From: Mac OS X: What is Safe Boot, Safe Mode?
http://support.apple.com/kb/ht1564
If that works fine, I would next also verify and repair your disk if needed.
Disk Utility 12.x: Repair a disk
http://support.apple.com/kb/PH5836
Print this help page so you can refer to it later. (You don’t have access to Disk Utility Help when you restart up your computer in the next step.)In the Disk Utility Help window, choose Print from the Action pop-up menu (looks like a gear).
Choose Apple menu > Restart. Hold down the Command (⌘) and R keys as your computer restarts.When you see a white screen with an Apple logo in the middle, you can release the keys.
Click Disk Utility, and then click Continue.
In the list at the left, select the item you want to repair. (Be sure to select an item that’s indented to the right in the list, not an item at the far left.)
Click First Aid.
If Disk Utility tells you the disk is about to fail, back it up and replace it. You can’t repair it.
Click Repair Disk.If Disk Utility reports that the disk appears to be OK or has been repaired, you’re done. Otherwise, you may need to do one of the following steps.
If Disk Utility reports “overlapped extent allocation” errors, two or more files occupy the same space on your disk, and at least one of them is likely to be corrupted. Check each file in the list of affected files. If you can replace a file or recreate it, delete it. If it contains information you need, open it and examine its data to make sure it hasn’t been corrupted. (Most of the files in the list have aliases in a DamagedFiles folder at the top level of your disk.)
If Disk Utility can’t repair your disk or it reports “The underlying task reported failure,” try to repair the disk or partition again. If that doesn’t work, back up as much of your data as possible, reformat the disk, reinstall Mac OS X, and then restore your backed-up data.If you continue to have problems with your disk, it may be physically damaged and need to be replaced.
Thank you for using Apple Support Communities.
Cheers,
Sterling

PowerPC Mac Mini gets stuck at grey apple logo screen, wont start

I have a bit of a problem and would appreciate some help, im not especially good at this stuff.
My Powerpc Mac Mini froze up recently, having left it on for a few days without shutting down/resetting. I impatiently turned it off with the power button at the back. When I turned it on again, it only got as far as the grey apple logo screen, it now refuses to go past this screen despite numerous power resets, and unplugging at the power.
I have reset the PMU and the PRAM as suggested by the troubleshooting, to no avail - the PRAM did work as it changed the resolution of the apple logo, but still got stuck at the grey startup screen. Its out of warranty so I have to pay for technical support. Can anyone help?
Message was edited by: misternuge

If you have the original install disk that came with your mini, the first thing to do is to insert that, and then boot the system holding the C key down. This should force it to boot from the install disk rather than the internal drive. The reason you want to do this is two-fold: firstly that if it boots OK that way, it shows the basic hardware is OK, and secondly, it's possible that the hard drive has developed errors (likely directory damage) and the tool to check for that and attempt to resolve it is on the install disk.
Once you've got the system booted to the install disk, exit the installer and run the Disk Utility application. That should display the internal drive (and the install disk) on the left. Select the internal drive and then click 'Repair Disk'. If no errors are found, the drive is fine and the problem lies elsewhere. If errors are reported and the disk is fixed, then you should be able to reboot normally afterwards. If errors are found and Disk Utility reports 'error on exit' not having fixed them, then run it again just to be sure, but otherwise it means the drive is damaged sufficiently that Disk Utility can't fix it. A third-party application such as Alsoft's DiskWarrior will then be needed if you want to try and fix the drive and recover data, or you can simply elect to do an erase and install, meaning the drive will be reformatted and a new copy of MacOS installed. Do not do this if you have data you need to get off the drive!!

My 2011 IMac will not boot up past the White apple logo screen with the whirly circle

My 2011 IMac will not boot up past the White apple logo screen with the whirly circle. I have tried various commands but to no avail. does anybody have any advice?

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.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. 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.
d. 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 the technique in Step 1b, 1c, or 1d 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 11. 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
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
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 11
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 12
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 13
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.

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I have attempted a safe boot (holding down shift while while holding the power button down), and Reseting the NVRAM by pressing 'command', 'option', 'P' and 'R' at the same time.
I do not have an installation disk or a time machine back up.
Does anyone know how to get passed the Grey start up Screen?
Any Suggestions would be mucho appreciated.

I have recently installed a free update of Mavericks on the App store. However after installing this, the Macbook Pro that i've installed on will not boot beyond the Grey start up screen. I was running Snow Leopard on a machine with intel core 2 duo processors 4 Gb of RAM and over 100Gb of free memory.
I have attempted a safe boot (holding down shift while while holding the power button down), and Reseting the NVRAM by pressing 'command', 'option', 'P' and 'R' at the same time.
I do not have an installation disk or a time machine back up.
Does anyone know how to get passed the Grey start up Screen?
Any Suggestions would be mucho appreciated.

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HI All,
My iMac wont startup. It gets to the screen with the apple logo on it with the small dial spinning and thats it .... I left it for a bout 10 - 15 mins and thats as far as its got!
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Error: The underlying task reported failure on exit
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Dear All,
I tried safe mode, single user mode and resetting NVRAM or PRAM, and fsck -fy and /sbin/mount -uw / and etc etc
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Boot with the Snow Leopard install disc and reinstall the software.

Macbook won't get past the grey start up screen

I purchased my Macbook in 2008, roughly July.
My fiance unknowingly shut down my macbook in the middle of start up. Before that it was running perfectly fine, I had no issues.
After my fiance stopped the start up, the macbook won't turn on. It'll load up to the grey loading screen (example here)... It doesn't make much noise as it starts up either. I have all original discs that came with the macbook, if that helps any.
I'm frustrated, as I can't afford to replace my mac at this point.
Any idea what I can do?
Thanks..

Hopefully, nothing permanent. Do the following:
If you have Snow Leopard installed:
Reinstall Snow Leopard without erasing the drive
Do the following:
1. 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.
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2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install the Combo Updater for the version you prefer from support.apple.com/downloads/.
If you have Lion installed:
Reinstalling Lion Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the 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.
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Note: You can also re-download the Lion installer by opening the App Store application. Hold down the OPTION key and click on the Purchases icon in the toolbar. You should now see an active Install button to the right of your Lion purchase entry. There are situations in which this will not work. For example, if you are already booted into the Lion you originally purchased with your Apple ID or if an instance of the Lion installer is located anywhere on your computer.
If you have Leopard installed:
How to Perform an Archive and Install
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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, Leopard or Snow Leopard.) 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. Now restart normally.
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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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Reinstall the operating system from the dvd (you will not loose your data)

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This problem concerns an old mac g5 that I had replaced three years ago because it hadn't been working properly. I am getting it out because my son needs a computer and I was hoping that the thing would work for a little while.
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http://www.ifixit.com/ may be able to help if you suspect that.

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I have a G-5 PowerMac.
Its about a year old.
I have used it more than sparingly. I bought it for video editing and have no other programs installed on it that didn't come with the computer besides Final Cut Pro
I tried to turn it on this morning to edit a project i'm working on and the thing just wont get past the Grey Apple Screen.
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Hey Cris
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2. If the Apple article does not fully resolve the problem for you, then try Troubleshooting issues with iTunes for Windows updates - MSVCR80.

My macbook pro wont get past the grey screen at startup. Help!!

After doing a run of the mill software update on my macbook pro (running snow leopard) it froze during the "moving items into place" stage. I forced a shut down and now it wont get past the grey screen with apple logo and spinning wheel. I have tried booting from the original DVD but it still freezes. When I boot it in verbose mode it seems to stop at "jnl: unknown-dev: update_fs_block: error reading fs block # 3597880! (ret 5)", the Apple AHCD Disk Queue manager :: set power state is timing out and there is a disk I/O error. I have tried to reset the power manager (not sure if it worked or not) and I have also tried clearing the PRAM (again, not sure of that worked). When I try to look at the hard drive using target mode on my imac the hard drive doesn't come up but the DVD does. I'm concerned that my hard drive is fried. Any suggestions?

It would help to state in your post which remedies you tried that didn't work.
Start here > OS X Lion: If you see a gray screen at startup
If nothing there helped, try Starting up in Safe Mode
Safe Mode deletes some system caches that may help.
A Safe Mode boot takes longer than a normal boot so be patient. Once you are in Safe Mode, click Restart from the Apple menu.
If a Safe Mode boot didn't work, since your Mac has OS X v10.7 installed, restart your Mac while holding down the Command + R keys so you can access OS X Recovery built in utilities. The startup disk may need repairing.
Tip: Hold down the Eject key while starting up your Mac to eject a disc.

G5 dual 2.7GHz refuses to get past the grey apple logo screen no matter what I do!

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