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Mac takes 15mins to turn on

1767 Views 13 Replies Latest reply: May 6, 2012 8:00 AM by Linc Davis RSS Branched to a new discussion.
Ron74 Calculating status...
Currently Being Moderated
Mar 15, 2012 6:29 AM

                                             My Mac is currently taking around 15mins to turn on.  It starts OK with the apple logo then goes to a blank blue screen for anything upto 15mins then finally the normal desktop screen appears and evrything works fine.  On one occasion only I had the same problem on shut down, where it sat displaying blue screen for a long period before switching off.


Any ideas please ?




  Model Name:          iMac

  Model Identifier:          iMac11,2

  Processor Name:          Intel Core i3

  Processor Speed:          3.2 GHz

  Number Of Processors:          1

  Total Number Of Cores:          2

  L2 Cache (per core):          256 KB

  L3 Cache:          4 MB

  Memory:          4 GB

  Processor Interconnect Speed:          5.86 GT/s

  Boot ROM Version:          IM112.0057.B00

  SMC Version (system):          1.64f5

iMac, Mac OS X (10.6.7)
  • a brody Level 9 Level 9 (62,060 points)
    Currently Being Moderated
    Mar 15, 2012 6:30 AM (in response to Ron74)

    Backup your data*:

    And then we can look into potential causes.

    10.7.1 iMac 5,1 MacBook Pro 3,1, Mac OS X (10.7.1), - * Links to my pages may give me compensation.
  • Linc Davis Level 10 Level 10 (107,955 points)
    Currently Being Moderated
    Mar 15, 2012 10:17 AM (in response to Ron74)

    Launch the Console application in any of the following ways:


    Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


    In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


    If you’re running Mac OS X 10.7 or later, open LaunchPad. Click Utilities, then Console in the page that opens.


    Step 1


    Select "system.log" from the file list. Enter "BOOT_TIME" (without the quotes) in the search box. Note the times of the log messages referring to boot times. Now clear the search box and scroll back in the log to the time of the most recent boot when you had the problem. Post the messages logged during the time when you had the problem – the text, please, not a screenshot. For example, if the problem is a slow startup taking three minutes, post the messages timestamped within three minutes after the boot time. If the problem is a crash or a shutdown hang, post the messages from before the boot time, when the system was about to crash or was failing to shut down.


    Edit out excessive repeats and personal information, if any.


    If the log doesn't go back far enough in time, scroll down in the Console file list to /private/var/log/system.log.0.bz2. Search the archived log, and if necessary the older ones below them, for the same information.


    Step 2


    Do the same with kernel.log.


    Step 3


    Still in Console, look under System Diagnostic Reports for crash or panic logs, and post the most recent one, if any. For privacy’s sake, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if present (it may not be.) Please do not post shutdownStall or hang logs – they're very long and not helpful.

  • Linc Davis Level 10 Level 10 (107,955 points)
    Currently Being Moderated
    Mar 15, 2012 12:53 PM (in response to Ron74)

    Please select  ▹ About This Mac ▹ More Info ▹ System Report from the menu bar. Under Hardware Overview, what do you have for the following?


      Model Identifier

      Boot ROM Version

      SMC Version

  • Linc Davis Level 10 Level 10 (107,955 points)
    Currently Being Moderated
    Mar 16, 2012 6:36 PM (in response to Ron74)

    Please read this whole message before doing anything.


    This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.


    The purpose of this exercise is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. The instructions provided by Apple are as follows:


    • 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 icon and the progress indicator (looks like a spinning gear).


    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.


    Test while in safe mode. Same problem(s)?


    After testing, reboot as usual (i.e., not in safe mode.)

  • Linc Davis Level 10 Level 10 (107,955 points)
    Currently Being Moderated
    Mar 17, 2012 6:49 AM (in response to Ron74)

    Back up all data, then boot from your recovery partition (command-R at startup) and reinstall the Mac OS. You don't need to erase the boot volume, and you won't need your backup unless something goes wrong. If your Mac didn’t ship with Lion, you’ll need the Apple ID and password you used to upgrade, so make a note of those before you begin.

  • Linc Davis Level 10 Level 10 (107,955 points)
    Currently Being Moderated
    Apr 27, 2012 5:12 AM (in response to Ron74)
  • Linc Davis Level 10 Level 10 (107,955 points)
    Currently Being Moderated
    May 6, 2012 8:00 AM (in response to Ron74)

    You have a hardware fault. Make a "Genius" appointment at an Apple Store to have the machine tested.


    Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros (do this only if you know how to restore, and you have at least two independent backups.) Don’t erase the Lion recovery partition, if present.


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