Boot up problem with Lion 10.7

Discussion in 'iMac' started by skeletoncrew, May 2, 2013.

  1. macrumors newbie

    May 2, 2013
    My son unplugged during an update now it only boots to a white screen and an apple then after 10 minutes to a grey screen with his log on and a guest log on. You try to log in and it goes white for a second and the back to the grey screen.

    I have no back up disks or restore points

    I tried rebooting holding down Option button and selecting recovery drive but when I go to restore the OS it tell me the hard driver is locked . On the regular hard driver it says locked also so it won't allow to move forward.

    Mac is about a year old.

    How do I restore my OS by unlocking the hard drive and or recovery drive?

    Please help anyone who knows macs!:

    21.5 in mac
  2. macrumors 68020


    Jan 2, 2009
    its been awhile so i may be wrong. but boot into recovery mode, then go into disk utility. the install drive should be grayed out. now check the menus of disk utility there should be a menu option unlock drive. it will then ask you for a password which i believe is the administrators password. then it should be ok to format and reinstall.

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