Won't go past gray screen

When we turn on the mini it gives us a Guest Log in screen....no home screen?

Hold the Mouse button down while powering up to eject the Disk, but is this a USB KB/Mouse, or the cantankeroos Wireless models?
Are you using...
Firmware password protection in Mac OS X ...
http://support.apple.com/kb/HT1352
It would block usage of all the startup keys, like C, N, T, D, CMD+s, CMD+Option+p+r, CMD +v, Option, and Shift, as well as booting from anything but the Hard Drive.

Similar Messages

  • Computer won't boot past gray screen

    I can't get my computer to boot past gray screen. It keeps showing the apple logo and the spinning wheel.  What can I do to get into my system?

    Startup - Gray, Blue or White screen at boot, w/spinner/progress bar
    Startup - Gray Screen
    Startup Issues - Resolve
    Startup Issues - Resolve (2)

  • Startup Issues - computer won't go past gray screen

    PLEASE HELP! I have a Power Mac G4. I installed OS X Tiger on it. Then I tried to install Quark 5, which is a Classic program. The computer said there was no longer Classic support on it. I mistakenly thought I would try to boot the computer in OS 9 to install Quark, so I changed my startup disk. Now the computer won't go past the gray screen at startup, because apparently there is no more OS 9. How do I boot up the computer to OS X again?
    Power Mac G4   Mac OS X (10.4)  

    Hi, KHickey -
    Will I have to back up my files?
    Not usually. You should be able to re-install OS 9 (Classic) on that model via a Clean Install with no loss of any files.
    That machine originally came with a model-specific version of OS 9.0.4. You can use the original OS 9 Install CD that came with it to install that version, and update via download updaters to v. 9.1 or later in order to use it as Classic (the OS 9 install must be at least v. 9.1 in order for it to be used as Classic by OSX; OS 9.2.x provides better compatibilty in that mode). Or, you can use a retail OS 9.1 or retail OS 9.2.1 Install CD.
    In either case, a Clean Install would be the method to use. A Clean Install of OS 9 removes nothing, and gives you a new, uncomprimised System Folder.
    Article #58176 - Mac OS 8, Mac OS 9: Performing a Clean Installation
    <hr>
    There is a situation where the OS 9 install can be good, but the machine is still not able to boot to it. This can happen when the hard drive was last initialized using OSX's Disk Utility, and the option to install OS 9 drivers was not selected. IN the absence of those drivers the volume can not be mounted by OS 9, including an OS 9 on the volume - hence it can't boot to it.
    An easy way to tell - while in OSX, do a Get Info on the drive; I believe one of the pieces of info given about the drive is whether it has OS 9 drivers installed.
    Or, boot the machine to an appropriate version OS 9 Install CD - if the drive has OS 9 drivers, the volume will appear on the desktop; if it does not, it won't.
    More info about that, including a small possibility of recovering from the situation, can be found in this Apple KBase article -
    Article #106849 - Disk Is Available in Mac OS X But Not in Mac OS 9
    If you do have to re-initialize the drive in order to get OS 9 drivers on it, then you will need to back up all your files - initializing a drive will erase everything on it.

  • G4 Power Mac won't boot past gray screen

    I have a mirror door g4 power pc that had been having some issues with not turning on, and after testing the power supply, it failed miserably. We placed a refurbished power supply in it from a company in New York and the computer was working wonderfully. I went on a cruise last week and went to turn the computer on for the first time in a week and a few days. The CPU turns on, the unit chimes, the fan turns on and the computer starts to boot up, but it won't boot past the gray apple logo screen.
    Actually, the first few attempts to boot it resulted in a blue screen with gaint apple logo and spinner; it wouldn't advance further. After several restarts and resets, I got it to come up into the normal gray screen. On several attempts it wouldn't boot further than this. On two occasions now though, it has moved past the gray screen to normal operation (it takes about an hour for it to get to that point though) but with some kind of errors. I get the side bar, but the gray panel on to with "file" ect is gone and my HD icon never comes up. The icons on the sidebar do not respond when clicked.
    The computer will not boot from the OS X disc.
    What's going on, hard drive? Virus? Something else?

    You likely have hard drive directory issues or worse.
    Virus is just a hopeful whimsy.
    No virus.
    I hope that you have a backup of your data.
    Try a Safe Mode boot. This forces system repair of the directory (if possible).
    Hold Shift while starting to enter Safe mode. Be patient, as it can take several minutes to complete.
    Failure to boot to the OS X disc is not good. A severely damaged drive can prevent boot while connected.
    Disconnect your boot drive and try booting to the OS X disc.

  • Desperately Seeking Genius: iBook G4 won't go past gray screen w/ apple...

    Hi AppleHeads. I am looking for some assistance from a nice mac genius. I am trying to fix my sister's computer and am not sure exactly what to do here. Her laptop is an iBook g4 with 1.33GHz Power PC, G4 processor, 512 MB and 40 GB hard drive. She had noticed her computer getting really slow and crashing frequently. She ran some updates this morning and then the computer crashed. Now, it will not turn on past a gray screen with the apple logo. I attempted to trouble-shoot the issue using the guide the computer came with and also ran the Apple Hardware Test. Everything passed -- see the results below. What is my next option? I would like to try and save all of the data as she has not backed up recently (tsk tsk). I'm sure a lot of people post this kind of request, so if there is a solution out there that you know of, please share the information or links. I know that one option is to wipe out the computer and reinstall Mac OS X but I'd like to only do that as a last resort until I can pull the files. Thanks!
    Apple Hardware Test - Extended Test results:
    Extended Test
    AirPort Passed
    Logic Board Passed
    Mass Storage Passed
    Memory Passed
    Model Device found
    Video RAM Passed
    AirPort Passed
    Logic Board Passed
    Mass Storage Passed
    Memory Passed
    Model Device found
    Video RAM Passed

    Hi Doley and welcome to Apple Discussions,
    is an iBook g4 with 1.33GHz Power PC, G4 processor, 512 MB and 40 GB hard drive. She had noticed her computer getting really slow and crashing frequently.
    Was she aware of how full the hard drive was? That can often lead to problems.
    Uh oh just noticed this:
    Mac OS X (10.0.x)
    Is that right?
    the 14.1" 1.33 ran Mac OS X 10.3
    the 12.1" 1.33 Mac OS X 10.4
    Saving Data:
    Does she have the original install disks?
    See if it can boot from them or an appropriate installer for the size.
    If so then save to an external drive or another Mac in target mode.
    If her iBook will go into target mode it would then act like a big expensive external hard drive:
    http://docs.info.apple.com/article.html?artnum=58583
    After saving data:
    http://docs.info.apple.com/article.html?artnum=106214
    or use disk utility. Depends on what OSshe was running.
    She ran some updates this morning and then the computer crashed.
    If it happened while the computer was updating after downloading them that would really mess up the OS.
    If that's the case it might take a program like Data Rescue II to retrieve data off that hard drive.
    Richard

  • Macbook Pro 2.16 15" won't go past gray screen

    My MBP 2.16 15" that was running on Snow Leopard stop loading past the gray screen.
    I was able to recover the data via connected to my imac. So I can see the orginal hard drive just fine. So my first guess was a bad hard drive so I bought a SSD and put it in. The Snow Leopard DVD install disk shows up when you hold the "option" button at startup, but when you choose the Install DVD disk, it doesn't get past the gray screen. I even tried with the DVD install disk the MBP came with 10.4.8 I think, but the same results.
    It will boot in safe mode, with the cursor looking like it has small bars underneath it.
    I've tried numerous things including
    - PRAM/ SMC reset
    - taking RAM out and using just the factory RAM
    The Mac "Genius" said the hardware test ran fine on everything, but it wouldn't boot up with the network startup, a USB startup or Firewire startup.
    I went back to the orginal hard drive last night and went into safe mode. Tried to install Snow Leopard and it starting installing..it took 55 minutes and my hopes were high at midnight. But when it rebooted itself...it just went to the gray screen again.
    I'm out of ideas and I'm pretty sure something is up with the logic board. What do you guys think?
    I've also heard that the video card on the late 2006 models of MBP give users fits.
    all help is appreciated.

    Ok.  I think I got it.
    I reset the NVRAM.
    http://support.apple.com/kb/HT1379

  • Won't boot past gray screen

    I recently tried to upgrade RAM from 2x256 MB to 2x512 MB (PNY PC133 SODIMM 133Mhz). This worked at first and checking "About this Mac" indicated 1GB of RAM. But trying to use Safari or Firefox would freeze the computer and I'd have to hold the power button to reset. I put the original RAM back and now I can't get past the Gray Screen with spinning gear. I'm stuck at this screen with either set of RAM in. I tried to boot with the Apple Hardware Test disc, which worked and showed that everything was working fine (Logic Board, HD, & Memory included). Any suggestions?

    thunderable and fantast1cdan
    It sounds like both of your PowerBooks are suffering from a failed internal hard drive. If you have a cloned, fully bootable, backup on an external FireWire hard drive then try starting up from that. If that works then it suggests the PB's logic board is alright and the problem is most likely to be the hard drive.
    If the failure is due, perhaps, to a software corruption then DiskWarrior might be able to resurrect it by repairing the directory.
    On the other hand a complete erase and 'zero all data' might sometimes help as it will map out any bad blacks that are on the drive. Obviously to do this you need to be able to startup using the original installer disc - but that does not seem possible at the moment.
    Alternatively if you have access to another FW-equipped Mac then try using FireWire Target Disk Mode to see if the drive can be accessed.
    thunderable
    Unable to eject properly, I unplugged the external drive and was able to reboot and get almost to the logon screen, but it wouldn't go any further. Since then I cannot get past the gray screen with the Apple logo and spinning circle.
    Are you referring to the internal hard drive when you say that you were able to reboot almost to the login screen? Or were you trying to reboot from the external drive?
    2.0GHz MacBook, 15" 1.25GHz/12" 1GHz PBs, 2xPPC Mac minis, 12" iBook G4,   Mac OS X (10.4.8)   Cube, 2xTAMs, iPod 4G & nano 2G, 1G & 2G iPs, AEBS, AX

  • Macbook won't boot past gray screen.

    Macbook will not boot past the gray screen with the Apple logo. I tried booting in Safe Mode... tried booting to the Leopard install DVD (can hear it spin)... tried resetting the PRAM... all to no avail (hangs on the gray Apple screen... no progress indicator). I am able to connect to the hard drive via Firewire from my MacPro no problem. Just to make sure, I also tried swapping the hard drive for the original hard drive that it came with (upgraded hard drive 2 yrs ago) but it did not make a difference, still did not boot.
    Not sure what else to try, any suggestions?

    Thanks for all the replies. I do think it is probably the logic board. Unfortunately the nearest Apple store is about 3.5 hours away from me and from what I've read online the price to put a new logic board in by them is around $700... that's about $300 shy of a NEW 13" Macbook! I am finding used or new logic boards for sale online for around $350 to $450.
    The reason it seems that it is the logic board is like I previously said in the opening thread that it would not boot to two different hard drives that I put in the Macbook, nor would it boot to the install disc that I put in the Superdrive.... "tried booting in Safe Mode... tried booting to the Leopard install DVD (can hear it spin)... tried resetting the PRAM". Being able to connect to the Macbook's hard drive from a MacPro via a Firewire gives me reason to believe the hard drives are not the problem.
    Now I guess I'll have to make a decision as to whether or not to shell out cash during this weak economy for a new Macbook or scrounge for components for a 4yr old laptop.
    Any final last words for me?

  • Ibook g4 won't go past gray screen, hard drive making whirirng noises

    I think I'm in pretty serious trouble here...
    I left my 2-yr old ibook g4 running last night downloading a couple of torrents, and woke up in the middle of the night because it was making a loud whirring noise. I tried to close everything, but found that it was frozen. So I just powered it off. I've never had it freeze on me, or otherwise had any problems with it before.
    When I turned it on this morning, it would make the initial startup chime, but would not go past the grey screen with the apple. I tried several times, with a couple of slightly different results. The first time I got the apple with the circle underneath. The second time, I got no apple, but the circle with a line through it. And the final time, its just been the apple. And all the while, the hard drive is making a really ill sounding whirr.
    I read another post about trying to boot from the install CD, so I inserted the CD & pressed c, but nothing happens, and now the CD won't eject.
    Is it possible that it overheated? I got an e-mail about the battery recall, but according to my serial number, mine wasn't one that was being recalled.
    Please help!
    iBook G4 Mac OS X (10.3.9)

    Haven't had any replies yet, but I do have some progress to report...
    I was able to eject the Panther Install CD1 after all (pressed the eject button immediately after I powered on). Have tried booting from it a couple of times, to no avail. I was, however, able to boot it from my friend's Tiger Install DVD. I went into Disk Utility, as I have read elsewhere and tried to repair my hard disk using that, but got the following error:
    "Repair disk failed. Could not unmount disk"
    Probably a stupid question, but is it because its not the correct operating system?
    I still don't know why it won't boot from my Panther CD.
    I have tried to boot in Safe Mode, but all I get is a little folder icon that alternately flashes the finder icon & a question mark.
    I purchased my ibook online when I was still living in Canada, but its no longer under warranty and I didn't purchase the protection plan. I am currently living in rural Japan, with absolutely no Apple Stores anywhere remotely close to where I am.
    I've also seen elsewhere that I could probably just get a new hard drive, which is fine as I could use the extra space anyway, but does this mean I lose everything that's on my current hard drive??
    If anyone has any suggestions, it'd much appreciated!
    iBook G4 Mac OS X (10.3.9)

  • Won't get past gray screen/apple

    My son's mac book will not start. It shows the grey screen and apple logo but no further. I ran utilities from leopard install disk and it says SMART said the disk is about to fail. I ran DW 4.1 and Drive Genius 2.0.2 to no avail.
    How can I get the data off of this HD?
    Thanks
    Geoff

    See if you can get DiskWarrior to mount the drive in "Preview" mode. I recently cloned all my files off an external drive that was hosed. Thanks to DW I recovered all my files.
    -Bmer
    Mac Owners Support Group - Join us @ MacOSG.com
      Mac611 Mobile Mac Support - about.Mac611.com
       iTunes:MacOSG Podcast | YouTube.MacOSG.com
                       An Apple User Group 
    Have an iPhone or iPod touch? Enter Mac611.com in Safari on it for 'mobile Mac support.'

  • Imac won't go past gray screen with apple w/circle of bars spinning. Help!

    I let the circle spin for over 15 minutes, and occationally you can hear the little sound that makes you think it's going to
    start... It just doesn't.  I tried pushing the power button then holding down the Command, Option, P, and R keys... Held
    for about 3-4 minutes, no second chime.  Help, please!!!

    Hold the Mouse button down while powering up to eject the Disk, but is this a USB KB/Mouse, or the cantankeroos Wireless models?
    Are you using...
    Firmware password protection in Mac OS X ...
    http://support.apple.com/kb/HT1352
    It would block usage of all the startup keys, like C, N, T, D, CMD+s, CMD+Option+p+r, CMD +v, Option, and Shift, as well as booting from anything but the Hard Drive.

  • 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.

  • Intel iMac will not boot past gray screen

    Intel iMac will not boot past gray screen
    my system:
    new (month old) 24" intel imac, 2.8 ghz, 4 gb ram.
    running: leopard (upgraded from tiger, which was pre-installed at purchase), installed 10.5.1 update right before this huge problem occurred.
    install discs on-hand: two-disc tiget set, single leopard upgrade disc.
    what led to this:
    i wanted to install windows using bootcamp on a 50 gb partition.
    at this point i was running leopard 10.5
    i followed all bootcamp instructions, printing out the guide, as well. once i got into the windows setup, i was prompted to choose a partition to install windows. unlike the bootcamp guide, which showed three partitions, one clearly labeled "bootcamp", i saw only one partition. not wanting to risk writing over my mac partition, i quit the setup and rebooted the mac os. after some googling around, i looked for firmware updates (didn't need any), and then software updates. i decided to try updating to 10.5.1.
    i then ran through boot camp again, deleting my previous windows partition, creating a new one, and moving forward as before. once again, i was only shown one partition to choose from in the windows setup. i exited the setup again to reboot through the mac os, but this time, i was only given a blank gray screen.
    here's what i have tried so far:
    booting from a CD, holding down the C or D keys: no response (in fact, i have to restart the computer holding down the mouse button to be able to eject the CD)
    booting with option key held down: gray screen
    booting with option key held down with external bootable firewire drive attached: the firewire drive appears as a boot icon, and i can click on it within a five second window, but then the screen freezes after that time period, and nothing changes
    booting into target mode while attached to another mac: gray screen (no firewire icon, and drive never shows up on other mac)
    resetting NVRAM: i'm able to hear the boot chimes, but no difference in performance. gray screen every time
    Safe boot: nothing but a gray screen
    Verbose mode: gray screen
    Single user mode: gray screen
    Single user mode with firewire drive attached: occasionally (not every time), i am able to get the white on black terminal to show up. from here, i'm able to run fsck, but it appears to only be checking the firewire drive. i have tried several times to boot from here, and once it took me to a blue screen with movable arrow cursor, but it never went beyond this.
    is there anything else left to try before taking it to apple?
    any help would be greatly appreciated.
    thanks,
    Casey Burns
    Casey Burns Illustration and Design
    http://CaseyBurns.com

    I'd call Apple support at this point. You'll need
    to put this issue on the record.
    Call U.S. iPod and Mac technical support: 1-800-APL-CARE (1-800-275-2273)
    The wait may be long for an agent to come on the line
    so expect that and have some other stuff to do in the meantime.
    If you have the applecare protection plan, I'd ask about "onsite"
    service.
    I like your work ! Good luck !
    Slim
    Message was edited by: slimpikkunz

  • IMac Does not boot past Gray Screen

    iMac does not boot past Gray Screen.  2008 24" Intel iMac running Mountain Lion with 1TB hard drive. 
    Problem started yesterday while I was web surfing, and my iMac frooze and shutdown.  I rebooted and could only get as far as the gray screen. 
    On bootup the following things happen:
    Startup tone
    Gray screen with Apple, and gear spins below Apple. 
    Once the gear stops spinning, nothing happends. 
    Troubleshooting steps I have tried:
    removed all devices connected to iMac and rebooted, but same symptons occur.
    booted into Safe mode and run disk utilites.
         Disk Utilities found no errors on the drive, but did find two permission issues that it was able to fix.
              First permission issue: 
                       "Group differs on library; Should be 0; group is 80"
              Second permission issue:
                        "Permissons differ on library; Should be drwxr-xr-x; They are drwxrwxr-t"
    Disk Utilities says it fixes these issues and then I reboot, but get the same problem.
    I reboot back into Safe Mode and run Disk Utilities and it discovers the same problems listed above with Permissions.  It says it fixes them, I reboot, but the same problem occurs.  Its as if we are stuck in some sort of loop process. 
    Booted into Single User Mode and ran the following command:
         /SBin/fsck -fy   it reports back,  Volume Apprears to be ok. 
    I reboot, same issue !
    Performed SMC Reset, Rebooted, same issue
    Performed PRAM Reset, Rebooted, same issue.
    Booted into Recovery Partitioin (Command R) and ran disk utilities.  It found the same permission issues listed above.  It fixed them.  I rebooted.  Same problem still. 
    While in safe mode, I preformed a full time machine backup. 
    I am out of ideas.  Any help would be greatly appreciated. 

    Hello,
    I reboot back into Safe Mode and run Disk Utilities and it discovers the same problems listed above with Permissions.
    You can ignore repeated "fixes" it's not really a problem, if it says completed repairs that's all that's needed.
    Luckily it boots in Safe Mode, here's basically the steps to try to find out what it is...
    One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
    PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
    Reboot, test again.
    If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
    Check the System Preferences>Other Row, for 3rd party Pref Panes.
    Also look in these if they exist, some are invisible...
    /private/var/run/StartupItems
    /Library/StartupItems
    /System/Library/StartupItems
    /System/Library/LaunchDaemons
    /Library/LaunchDaemons
    Though I'm suspecting some corruption to your OS at the moment.

  • How to get past gray screen on MacBook?

    How to get past gray screen on MacBook?

    Here are some initial things to try.
    http://support.apple.com/kb/ts2570
    http://lifehacker.com/how-to-troubleshoot-the-four-most-common-oh-sh-t-mac-48708 0511

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