Flashing question mark on mac book pro,with grey screen when turned on?

flashing question mark on mac book pro,with grey screen when turned on?

Press the power button down to force a emergency hardware shutdown and hold the option/alt key down and reboot
If you see your OS X boot partition, then click it and the arrow, head to System Preferences > Startup Disk and reset it. Done.
Folder with question mark issue
If that doesn't it, then do a #2 PRAM reset and try the above again.
..Step by Step to fix your Mac
If no OS X boot volume appears in Startup Manager, then OS X is corrupted.
Try more of the Steps above (like 1-8) then if that doesn't work.
Create a data recovery/undelete external boot drive
Once you got your data off, erase and reinstall OS X onto the MacintoshHD partition and then restore from TimeMachine or bootable clone if you have it. or build new and return users files from the data recovery drive.
Most commonly used backup methods
If the drive doesn't appear in Disk Utility it might be dead  or there are further complications let us know for further assistance.
Install/upgrade RAM or storage drive in Mac's
My computer is not working, is my personal data lost?
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents#/?p er_page=50

Similar Messages

  • Mac book pro has grey screen with apple in the middle

    my mac book pro has a grey screen, apple in the middle and a spinning wheel.  i have tried the command r. nothing is working

    Mac OS X- Gray screen appears during startup
    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 one or more of these:
    a. Problem with the computer's PRAM - See Resetting your Mac's PRAM and NVRAM.
    b. Boot drive's directory has been corrupted - Repair with Disk Utility.
    c. Critical system files are damaged or deleted - Reinstall OS X.
    d. The disk drive is physically non-functional - Replace the hard drive.
    Note that the information I have provided is what Apple recommends, If other users suggest different solutions than found here, then be sure what they recommend does not impact on your warranty, if any, or ability to get continuing Apple service.
    Please don't start removing drives or changing cables unless you know what you are doing and have exhausted other non-invasive alternatives outlined here. If you perform any work yourself that is unapproved by Apple, then you will void any warranty you may have and lose all further Apple Support.
    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. Simply boot from the Recovery HD to perform the above.
    Reinstall Snow Leopard Without Erasing The drive
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    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 Mac OS X 10.6.8 Update Combo v1.1.
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    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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  • Brand New Mac Book Pro with defective screen

    Hi Guys,
    Does anyone here, purchased a brand new Mac Book Pro 13-inch: 2.9GHz with a defective screen?
    I bought mine, Last June 14. I just noticed the defect last June 29 and returned it to where I purchase it at june 30.
    There are somewhat 'black smudges' on the left part of the screen. I'm a graphic designer, so i know that this is a big issue for me.
    Also, the fact that I'm just using it for 5 times I think, since I bought it, and there's already an issue.
    At first, i was battling with the customer service (from where i bought it), They wouldn't want to give me replacement, because I already exceeded their 7 day return policy. But I'm not giving in, so then they just told me, they would send it to apple service.
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    So he called again and told me that he also saw it, and told me that they would replace the Monitor.
    I'm new with this, is it normally ok, that they will just replace the monitor? I mean, would it still work properly, now that they've
    opened it and replaced only the defective part?
    Hope you guys can give me your thoughts.
    Thank You.

    Not sure what part of the world you are in but Apple has a 14 day return policy. But even with the 14 days you exceeded that time limit. So the only option is to replace the defective part and not the whole system. This is standard operating practices for any manufacturer once you have exceeded the return period.

  • I am using a mac book pro with Leopard OS. when I switch my laptop on it flashes a grey folder with a question mark on a grey screen, after the chime. I have tried all the things mentioned in another discussion. none of those have helped. HELP! im scared.

    what must i do? im a student and dont have backup for my work. Im in desperate need of a solution where i wont lose my work from my desktop.

    You need to purchase Leopard if you don't have the DVD and reinstall OS X:
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  • Mac book pro with Retinal Screen

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  • Mac Book Pro mid 2012 screen colours turned red and purple (similar to rainbow colour)

    When I turned on my MacBook earlier, which was in sleep mode for all night, all the colours turned red and purple. The screen pixels were all a kind of red but the computer was working as usual. I turned it off and then back on and the screen was ok. Then I turned it off again for about 6 hours and now the colours are ok. Does anyone know what might be the problem? I am running on a MacBook Pro 13'' Mid 2012 (OS X Maverics) and it is the first time it's done anything like this. I read on Apple Support that maybe the CPU is failing, but when i run the System Diagnostics Test I think it turned out ok. I appreciate all answers.

    Start with this comprehensive troubleshooting article:
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  • I have a mac book pro 13 inch screen, when I go into Itunes, it only shows up on 1/2 the screen, how do i make itunes show up wider

    When I open Itunes it displays only on 1/2 of my computer screen, is there away that I can make it display on my full screen, check the full screen window function does not do anything, all my other's display fine it's just I tunes " Help"

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  • Before partition by Boot Camp on Mac Book Pro With Mac OS Lion the computer restarts but not open wizard of Windows 7 and appears the apple with question mark...

    Before partition by Boot Camp on Mac Book Pro With Mac OS Lion the computer restarts but not open wizard of Windows 7 install and appears the apple with question mark...don't recognize disk..

    Apparently Zoo Tycoon can't be played on anything newer than 10.7.
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    I have a Mac Book Pro with 10.6.8 and want to back up my files using a flash drive.  It says I did it but when I tried to check on my other Mac - an I Mac with 10.5.8, thedata does not seem to be there.  I cant see photos, etc..  It shows the backup as a file and shows various system info.  but there are no photos or other files shown.
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  • How do i install adobe flash flyer to my mac book pro laptop im unable to watch any video on you tube or ay where

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    Good Day,
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    Say thanks by clicking the Kudos thumb up in the post.
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    Apple will not write back to you. Telephone using the Apple Care phone number appropriate for your country and ask for a refund, if that is what you want to do.
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