3 Replies Latest reply: Oct 23, 2008 3:06 AM by OliBerry
Mike Turner Level 1 (45 points)
I am using a MacBook Pro IntelCD with OS10.5.4 all has been working satisfactorily till today. Today when I boot up it displays the grey screen with Apple logo, then spinning wheel and eventually goes to a black screen. Starting with safe boot does exactly the same although it spends a long time, 6-10 mins, in the spinning wheel zone. Booting into Windows is fine and the computer works perfectly.
Obviously something is wrong with Mac OS. Is there something to try before having to re-install the OS. Thanks for your help.


iMac IC2D/iMac G5/MacBook, Mac OS X (10.5.4)
  • Kappy Level 10 (263,335 points)
    Is this black screen with white type that eventually ends with a command line prompt or just a black screen? If the former then the computer is booting into Darwin or single-user mode. If the former then see these two discussion threads for a possible solution:

    Computer booting into Darwin Fix
    Apple - Support - Discussions - Booting to Darwin-BSD Screen

    If the solutions proposed in the above do not help, then you will have to reinstall OS X:

    How to Perform an Archive and Install

    An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.

    1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.

    Repairing the Hard Drive and Permissions

    Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the installer.

    If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.

    2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.

    3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.

    4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.

    5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.

    6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.
  • Mike Turner Level 1 (45 points)
    Thanks for the response. It is a completely blank screen so not in Terminal mode. In fact subsequent to posting I saw a post regarding "Resetting PRAM". In my case this did the trick. Thanks for the help.

  • OliBerry Level 1 (0 points)
    adjust the screen brightness on the keyboard.