Mac stuck on apple logo

When I turn on the computer, the screen looks like it's loading but won't start up.

Which OS X is installed?
For OS X v10.4, 10.5, and 10.6 >  Mac OS X: Gray screen appears during startup
For OS X v10.7 >  OS X Lion: If you see a gray screen at startup
For OS X v10.8 >  OS X Mountain Lion: If you see a gray screen at startup

Similar Messages

  • Mac stuck on apple logo, can't boot to disk utility...

    iMac 2010 running Yosemite.
    Stuck on apple logo with loading wheel but does not progress from here. Have booted in single user mode and proceeded to do the /sbin/fsck -fy steps until the volume was reported as okay, this did little to help. I can boot using the option key and can see the hard-drive and recovery partition are there however cannot boot using command+R to access the disk utility as it simply stays on the apple logo.
    Was wondering if anyone could advise what to do from here.
    Thanks in advance.

    Have you tried safe mode?

  • My macbook pro 2012 mac os x lion 10.7 stuck at apple logo with spinn wheel

    my macbook pro 2012 mac os x lion 10.7 stuck at apple logo with spinn whell and i held it for hours nothing happend so i tried to boot from recovery hd so i started mac and pressed option key ...so a screen appears telling recovery hd with bar for wifi connection selection then i put my wifi details and choose roc. hd it again booted with same apple logo with spin wheel...what to do now ....i haven't tried reseeting pvram..etc nvram..

    Hi there lakra,
    You may find the troubleshooting steps in the article below helpful.
    Mac OS X: Gray screen appears during startup
    http://support.apple.com/kb/ts2570
    -Griff W. 

  • My iPhone 4S on iOS7 is stuck on Apple Logo, and it goes off, then back to Apple Logo again for hours. Pressing home button together with sleep button does not help. Plugging the phone to Mac and restart does not help either. What do I do?

    My iPhone 4S on iOS7 is stuck on Apple Logo, and it goes off, then back to Apple Logo again for hours. Pressing home button together with sleep button does not help. Plugging the phone to Mac and restart does not help either. What do I do?
    Have not backed up for months, so prefer not to lose the data.
    Thank you for your help in advance.

    Restore iPhone with iTunes on computer. Open iTunes on computer. Connect iPhone to computer with USB cable. Hold both Home and Power buttons until iTunes recognizes iPhone in Recovery Mode, usually about 20 seconds time of holding both buttons. Click the Update or Restore button that iTunes offers.

  • Process stuck at apple logo and than mac get turned off

    when I turn on mac , it get stuck at apple logo and than it exit out.

    try starting into recovery mode, hold option key and see if it can be selected

  • My Mac Pro Stucks at Apple logo while starting up.

    Hi.I have had my MacPro for a year.when i turn it on, it stucks on apple logo and nothing else.if you can solve my problem help me please.

    what i am saying is when i just press the power button the Apple logo comes up.while happening this,a load strip shows on the bottom of apple logo.it loads something on the same place for couple seconds and still the same.the gray circle line load indicator which is usual to see while turning on shows up too.the operating system does not start up at all and stuck on Apple logo.couple nights ago, i was testing a wrong article about hardwares and i did not know that the article was wrong.i turned of and on the system 4 or 5 times in a row.the sixth time i turned it on the operating system started up but the finder was not getting open.i waited a long time to see if it is gonna solve the problem by itself but it did not.the seventh time i turned it on as a restart the issue i described happens which is stucking on Apple logo.the is a CD in the disk driver also.that was the whole things about the problem.so sorry for annoying you and appreciate your help.

  • I cannot start my mac book. Apple logo and spinning wheel on gray screen. Tried pressing shift key on start up nothing happen. Tried shift command V screen is still stuck

    I cannot start my mac book. Apple logo and spinning wheel on gray screen. Tried pressing shift key on start up nothing happen. Tried shift+command+V screen is still stuck

    Reinstall OS X without erasing the drive
    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.
    If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
    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 Mac OS X 10.6.8 Update Combo v1.1.
    =======================================
    Reinstall - Mavericks, Lion/Mountain Lion
    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.
    Repair
    When the recovery menu appears select Disk Utility. 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 click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu. Select Restart from the Apple menu.
    Reinstall Mountain Lion or Mavericks
    OS X Mavericks- Reinstall OS X
    OS X Mountain Lion- Reinstall OS X
         Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is
                    three times faster than wireless.

  • IMac 27 OS 10.6.8 Stuck on Apple logo when trying to re-install

    I own a 1st own 27 inch 2.8 Ghz Core i7 Imac, 1 TB HDD and 12 GB 1067 MHz DRR3, originaly 4 GB then added 8 GB on 10/22/2011 from OWC. I own multiple iMacs for work but this one is mostly for entertaiment and play few online games like WoW and Stracraft 2.
    Been using this iMac for a couple of years and never had any issue with it untill the last 3 or 4 months. I started to notice that while while joining online games I was suddenly always the last one to load, then I was experiencing lag and very short freeze time during the game play.
    I then realized that I never did upgrade my memory so I decided to order an extra 8 GB from OWC, installed the sticks in and my load time was now solved, I was no longer the last one to load and most applications was running much smoother as well.
    2 or 3 weeks into it, the lag came back and the random freeze were happening more and more often to the point that I could no longer play the game. I also noticed that if I tried to do multiple file transfers at once or jump from app to app I was getting the wheel of fortune way too often. I check my hard drive and realized that it was almost full, about 900 GB out of 1 TB were in use! Did a major clean up and now the drive is down to 400 GB and 600 GB available.
    The wheel of fortune just won't go away, this computer is now so slow that it is pretty much unusable...
    What I have done so far to fix it:
    - I ram few time Disk Utility, every single time it finds quiet a few permissions errors and repairs, I was also volume error message in read that I could not fix, it was asking be to reboot + hold C with the install CD to do the repair.
    - Reboot the computer with the install DVD in hold C but I am getting stuck at the apple logo.
    - Ran Disk Warrior which gave me the same error and asked to reboot with hold C, same problem I am getting stuck at the apple logo.
    - Did a reboot + option, getting the volume choice, select the DVD then get stuck at apple logo.
    - Did a Command + S reboot, ran a check disk with repair, told me that everything was ok.
    - Back in OS X, ran Disk Utility, the volume error now gone but still getting permissions to repair each time I run a check.
    - Ran a full scan with Drive Genius, 0 bad blocks found after 3 hours of scan.
    - Ran all tests on TechTool Pro 6 and no error on disk nor on Memory, still find permissions issues when I check permissions.
    I am still getting the wheel of fortune randomly while I am typing this post, Techtool Pro is running memory test none stop, Drive Genius is scan the hard drive and Disk Warrior is checking permissions.
    I removed the extra 8 GB of memory, the Mac gets even slower and still get the random wheels when trying to do more than 1 thing at once...
    Not sure what to do next? I fell like the HDD is failing but every single test is telling me the opposite, can't figure out why i can't run an install after a reboot.
    Thoughts?

    Have you reinstalled Snow Leopard? Before doing that see the following:
    Kappy's Personal Suggestions for OS X Maintenance
    For disk repairs use Disk Utility.  For situations DU cannot handle the best third-party utilities are: Disk Warrior;  DW only fixes problems with the disk directory, but most disk problems are caused by directory corruption; Disk Warrior 4.x is now Intel Mac compatible. TechTool Pro provides additional repair options including file repair and recovery, system diagnostics, and disk defragmentation.  TechTool Pro 4.5.1 or higher are Intel Mac compatible;  Drive Genius is similar to TechTool Pro in terms of the various repair services provided.  Versions 1.5.1 or later are Intel Mac compatible.
    OS X performs certain maintenance functions that are scheduled to occur on a daily, weekly, or monthly period. The maintenance scripts run in the early AM only if the computer is turned on 24/7 (no sleep.) If this isn't the case, then an excellent solution is to download and install a shareware utility such as Macaroni, JAW PseudoAnacron, or Anacron that will automate the maintenance activity regardless of whether the computer is turned off or asleep.  Dependence upon third-party utilities to run the periodic maintenance scripts had been significantly reduced in Tiger and Leopard.  These utilities have limited or no functionality with Snow Leopard or Lion and should not be installed.
    OS X automatically defragments files less than 20 MBs in size, so unless you have a disk full of very large files there's little need for defragmenting the hard drive. As for virus protection there are few if any such animals affecting OS X. You can protect the computer easily using the freeware Open Source virus protection software ClamXAV. Personally I would avoid most commercial anti-virus software because of their potential for causing problems.
    I would also recommend downloading the shareware utility TinkerTool System that you can use for periodic maintenance such as removing old log files and archives, clearing caches, etc.  Other utilities are also available such as Onyx, Lion Cache Cleaner, CockTail, for example.
    For emergency repairs install the freeware utility Applejack.  If you cannot start up in OS X, you may be able to start in single-user mode from which you can run Applejack to do a whole set of repair and maintenance routines from the commandline.  Note that AppleJack 1.5 is required for Leopard. AppleJack 1.6 is compatible with Snow Leopard. There is no confirmation that this version also works with Lion.
    When you install any new system software or updates be sure to repair the hard drive and permissions beforehand. I also recommend booting into safe mode before doing system software updates.
    Get an external Firewire drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
    Backuplist
    Carbon Copy Cloner
    Data Backup
    Deja Vu
    iBackup
    JaBack
    Silver Keeper
    MimMac
    Retrospect
    Super Flexible File Synchronizer
    SuperDuper!
    Synchronize Pro! X
    SyncTwoFolders
    Synk Pro
    Synk Standard
    Tri-Backup
    Visit The XLab FAQs and read the FAQs on maintenance, optimization, virus protection, and backup and restore.
    Additional suggestions will be found in Mac Maintenance Quick Assist.
    Referenced software can be found at CNet Downloads or MacUpdate.
    As a start I would suggest using a utility like Snow Leopard (now Lion) Cache Cleaner or a similar utility such as TinkerTool System to clean all user, system, and font caches. Also:
    Open Activity Monitor in the Utilities folder.  Select All Processes from the Processes dropdown menu.  Click twice on the CPU% column header to display in descending order.  If you find a process using a large amount of CPU time, then select the process and click on the Quit icon in the toolbar.  Click on the Force Quit button to kill the process.  See if that helps.  Be sure to note the name of the runaway process so you can track down the cause of the problem.
    And, visit The XLab FAQs and read the FAQ on resolving SBBOD issues.
    Yours may simply be an issue of cleaning up. You can try creating a new user account. Log into the new account. Do all these problems disappear?
    The repetitive messages from Disk Utility are normal and may be safely ignored. I would be a bit concerned by the fact that you cannot successfully boot from an installer disc.

  • Macbook stuck on apple logo

    I've got a macbook and its almost new i havent used it much now i am trying to open it but its stuck in apple logo please help

    Take your computer to a local PC/Mac software repair shop, if you need hardware repairs take it to Apple.
    We can only assist those who can assist themselves.
    Good Luck.

  • Macbook Pro (A1278) - Unable to startup - stucks at Apple logo with spinning wheel.

    My friend gave me his macbook pro today having startup issue. It stucks on apple logo at startup with a spinning wheel.
    I have tried to repair disk but does not work.
    tried to reinstall OS but it says This Apple ID is not the one which you used to purchase this  OS version (something like that)
    I upgraded from mac os x lion to mountain lion.
    I do not have any installation media as well.

    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 boot failure is to secure your 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 your last backup, you can skip this step.   
    There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.
         a. Boot into 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, boot 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
    Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot 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.
    If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
    Step 3
    Boot in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
    Safe mode is much slower to boot 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 your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
    When you boot 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, your boot volume is damaged and the drive is probably malfunctioning. In that case, go to step 5.
    If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot 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 reboot as usual (i.e., not in safe mode.)
    If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
    Step 4
    Sometimes a boot failure can be resolved by resetting the NVRAM.
    Step 5
    Launch Disk Utility in Recovery mode (see Step 1.) Select your 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 reboot as usual.
    Step 6
    Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
    Step 7
    Repeat step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a backup.
    Step 8
    A dead logic-board battery in a Mac Pro can cause a gray screen at boot. Typically the boot failure will be preceded by loss of the startup disk and system clock settings. See the user manual for replacement instructions.
    Step 9
    If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store to have the machine tested.

  • MacBook stuck on apple logo. Repaired disk using disk utility, but when I restart, I'm still stuck on apple logo. Please help!

    My MacBook is stuck on apple logo and heats up. I tried restarting in safe mode but it's still stuck. I also tried to repair the disk using disk utility. It says that HD is ok, so when I restart, I'm still stuck on the logo. Is there a way I could fix this without loosing my files?

    Restart your Mac while holding down the Command + R keys so you can access OS X: About OS X Recovery
    From there you can reinstall OS X, repair the startup disk, and restore from a Time Machine backup.
    FYI ... wiht ML installed, the only way to repair the startup disk is OS X Recovery, not the Disk Utility app installed on your Mac. You can verify but not repair.

  • My macbook air is stuck on apple logo and circle with cross flickering

    Hi Please help
    My macbook air was giving error of memory full and then it switched off and now it won't boot and is stuck on apple logo and a circle with a line flickering
    Ive tried:-
    holding Cmd+r
    holding Opt
    Holding Cmd+Opt+R+P
    Nothing works. When I held Opt key it only shows Mac HDD and a wifi option underneath it, dont knw why thats there.
    Please help me I have a project to finish and don't know what to do with it. I also don't know what version of OS i had.

    Start with these instructions:
    http://support.apple.com/kb/ts2570
    Ciao.

  • IMac is stuck on apple logo and spinning wheel

    My wife did a software update and them it asked for a restart, she click restart but the computer got stuck in apple logo and spinning wheel. Won't go past that now. Just keeps spinning! Help for I know not what to do!!!! Please any idea?

    An invalid node is an error DU cannot repair. If you don't mind spending $100 for Disk Warrior, then I suggest you buy it because it can fix the error. Otherwise, do as the warning says. Backup your files. You will then have to erase the drive and reinstall. The procedure is:
    Install or Reinstall Lion/Mountain Lion from Scratch
    Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard 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.
    Erase the hard drive:
      1. Select Disk Utility from the main menu and click on the Continue button.
      2. After DU loads select your startup volume (usually Macintosh HD) from the
          left side list. Click on the Erase tab in the DU main window.
      3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
            the Security button and set the Zero Data option to one-pass. Click on
          the Erase button and wait until the process has completed.
      4. Quit DU and return to the main menu.
    Reinstall Lion: Select Reinstall Lion/Mountain Lion and click on the Install button.
    Note: You will need an active Internet connection. I suggest using Ethernet if possible
                because it is three times faster than wireless.

  • My Macbook is stuck on Apple logo when booting up!

    Hello,
        I have a Macbook Core 2 Duo that is stuck on apple logo, And I already tried inserting the mac OS x leopard disc but when I insert the disc and power up the Macbook it shows this picture down below. So if you have any answers that could solve my problem please comment down below Thanks!!!!

    OS X- About kernel panics
    OS X- How to log a kernel panic
    Visit The XLab FAQs and read the FAQ on diagnosing kernel panics.
    Note that panics at startup usually signal a hardware failure.
    Question (?) Mark, Blinking Folder, or Gray Screen at Startup
    These are related but not identical issues. Their causes are outlined in Intel-based Mac- Startup sequence and error codes, symbols. Solutions may be found in:
    A flashing question mark appears when you start your Mac
    Mac OS X- Gray screen appears during startup
    In most cases the problems may be caused by:
    Problem with the computer's PRAM - See Resetting your Mac's PRAM and NVRAM.
    Boot drive's directory has been corrupted - Repair with Disk Utility.
    Critical system files are damaged or deleted - Reinstall OS X.
    The disk drive is physically non-functional - Replace the hard drive.
    Repair the Hard Drive and Permissions
    Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
    If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
    The main difference if you are using Lion or Mountain Lion is that you must first boot from the Recovery HD:
    Boot From 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.
    Reinstall Snow Leopard Without Erasing The drive
    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.
    If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
    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 Mac OS X 10.6.8 Update Combo v1.1.
    Reinstalling Lion/Mountain 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.
    Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
    When the recovery menu appears select Disk Utility. 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 main menu.
    Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
    Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

  • TS1382 ipod nano 4th generation stuck on apple logo-any new suggestions??

    Ipod nano 4th generation is stuck on apple logo. It is fully charged and suggestione via apple have not helped. It still connects to my mac air and syncs but screen is frozen to the apple logo. Any suggestions?

    Have you done a Reset (restarts iPod)?
    http://support.apple.com/kb/ht1320

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