Locked Myself out of my Harddrive

Discussion in 'Mac Basics and Help' started by Layer3, Oct 25, 2007.

  1. Layer3 macrumors newbie

    Oct 25, 2007
    Hey guys, Im a fairly new Mac User and this ones got me stumped, I was messing around with sharing permissions On my Mac book Pro's HD and Set the option of the permissions for everyone to no access..... Well When I did that It completely locked everything out, I couldent log out, restart or anything. I tryed Clicking on the little lock to change it back but could not do that, I finely hard rested the Macbook Pro thinking I could log on to the Admin account ( I have 2 accounts one Admin that I never use and another without admin Privileges) And now it just hangs on the Grey apple logo..... I popped in the disk to see if I could repair permissions on the disk and that don't work eather!! I get a error message (Error: the underlying task reported failure on exit) and then repair compleat... Iv also Followed the advise of this thread post http://forums.macrumors.com/showthread.php?t=206177 and get error messages in terminal ( no such file or directory)
    Well I don't know if this is a easy fix or not but this ones got me stumped....... You guys are my only hope cause I cant find a solution to this boneheaded mistake......
  2. astrostu macrumors 6502

    Feb 15, 2007
    My only suggestion would be to use the original install disk (restart and hold down the C button on the keyboard). It should then let you re-set all the permissions.

    But I've never done this and there could be other ways.
  3. Layer3 thread starter macrumors newbie

    Oct 25, 2007
    Already Have

    Iv allready done all that..... Any other Idea's??? This has all my homework on it ... And thanks for the fast reply:)

    When I try to repair permissions it get the error message ( disk utility stopped repairing permisions on "MacBook PRO HD" because the following error was encounterd

    the underlying task reported failure on exit)
  4. Layer3 thread starter macrumors newbie

    Oct 25, 2007
    Did I chmod 700 the Whole HDD?????

    Iv been doing some Research on this and found this post.... I was just wondering if that is pretty much what I did why I locked out everyone ( didn't know It meant me also) out of the HD Icon....

    read the rest
  5. trainguy77 macrumors 68040

    Nov 13, 2003
    I would start by just verifying the disk in disk utility off the CD. then if that doesn't work see if you can start in single user mode (hold down cmd-s) so the apple key and the s. If it dumps you at the prompt then your in business.

    EDIT: and as a last resort you can boot off an external harddrive and fix it that way.
  6. Layer3 thread starter macrumors newbie

    Oct 25, 2007
    Ya I can boot in user mode... But then what???

    Ya I can Boot in Single user mode but don't know what to do from there!!! Thanks for all the Help I have a huge project do tomorrow:eek: and need to get to my files..... Thanks:)
  7. Layer3 thread starter macrumors newbie

    Oct 25, 2007
    Sorry No external HDD

    Was going to get one... But just had a new baby so money went elseware.... Any other Ideas????... I have another mac in my room but cant get to my files on My laptop......

    P.S. Im verifying Permissions now and Will update you when its done..... Thanks again you guys rock!:cool:

    Edit: Verifying completed without any errors.... WHAT do I do Now????
  8. trainguy77 macrumors 68040

    Nov 13, 2003
    So I think I might have a solution. Boot into single user mode, then type:
    cd /
    chmod 777 .
    Press return after each line. Now this SHOULD open up your permission wide open so it can boot. At that point you will have to go back the root of macintosh HD and set the permissions as follows. You can read & write.
    Then owner: system
    access: Read & write

    Group: admin
    Access: Read & write

    Others: read only

    Also if it does not allow you to do the chmod type it as "sudo chmod 777 ."
    I have never tried this but hopefully it will work.
  9. trainguy77 macrumors 68040

    Nov 13, 2003
    O just thought of another thing if the above doesn't work then you can use target disk mode if you have a firewire cable.
  10. Layer3 thread starter macrumors newbie

    Oct 25, 2007
    Im Just going to reinstall the disk.....

    Thanks for the suggestions but I got Homework to finish and need to use my laptop... I just checked out my mozy account and It backed up most of my work last night:) at least enough to get me back on track.... would defanatley recommend them.........

    You get 2Gig's free of charge and can download a program that backs up automatically..... Check them out www.mozy.com

    Thanks again guys and let this be a lesson to everyone.... when you set the permissions don't click on No access for everyone... Because that apperantly means Root admin also....

  11. trainguy77 macrumors 68040

    Nov 13, 2003
    I was really hoping you would try the Chmod thing...because i think it might work just out of curiosity my brother was wondering too. COuld you still give it a shot?:D
  12. Layer3 thread starter macrumors newbie

    Oct 25, 2007
    Great! Ill Try that Now and Keep you updated....

    Ill Try that and If it Doesn't work then Ill just tuck my tail between my legs and do a clean install:(..... Thanks alot for all the help.... and Ill update with my result....:)
  13. polycat33 macrumors 6502

    Jul 1, 2007
    Alexandria, VA
    You should definitely try that before reinstalling, it's just two quick lines to type to possibly avoid a whole reinstall and downloading a ton of files. When you ask for help/suggestions you should try/take them. ;)
  14. kolax macrumors G3

    Mar 20, 2007
    Would an Archive and Install not work?

    It backs up all your files and replaces the system ones, so it is like a fresh installation. Only takes about an hour too.
  15. jbstew32 macrumors regular

    Jan 15, 2007
    I would be willing to bet money that chmod -R 777 / would do the trick, as someone stated earlier. I'm not sure if you'd need to put a sudo in front of that either, so it would be run as root instead of just admin (I think there is a difference, but am not 100% sure)

    if that doesn't work, then I wouldn't know what to tell you, aside from trying to boot from another drive and rescue the files or trying archive&install as a last resort

    oh and that chmod command isn't such a good idea from a security standpoint, but it should absolutely fix your problem. After you finish your work, you might want to archive&install just to reset all the permissions back to default.

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