Admin password invalid - forgot, cannot change.

Discussion in 'macOS' started by Jake Zurcher, Jan 20, 2010.

  1. Jake Zurcher macrumors newbie

    Joined:
    Jan 20, 2010
    #1
    I recently got my computer fixed and ended up getting a new one. it is a mac book laptop. I changed the password before it got sent and i completely forgot it. They backed my new laptop up with my old hard drive so now i got my old stuff on the new one. I want to download this application so i can fix this .zip file but i need the admin password. I've tried using the install discs but they tell me to enter the admin. I've tried putting the install disc in and pushing c on start up but it just freezes on the white screen with the apple. Is there something wrong with my computer? should i contact the insurance company who i dealt with? Thanks. If anyone can help with this problem i would be so very grateful. :]
     
  2. J the Ninja macrumors 68000

    Joined:
    Jul 14, 2008
    #2
    Reboot while holding down the command and S keys. You will see some text, and you will eventually be given a prompt. Once you get there, type the following, hitting enter after each line:

    Code:
    fsck -fy
    mount -uw /
    passwd username
    Replace "username" with whatever your username is. You will be asked to type a new password twice. You will not get any feedback typing it in, btw. Just type it, hit enter, and type it again. When you are done, type

    Code:
    reboot
    and hit enter one more time.

    Note that there is no way to get back whatever was in your login keychain.
     
  3. aaron11193 macrumors regular

    aaron11193

    Joined:
    Mar 27, 2009
    Location:
    Karumba/Cairns/Charters Towers, QLD, Australia
    #3
    So you are saying anyone that knows this can hack into my Mac? :eek:

    Seems like a massive security flaw, kind of defeats the purpose of having a password.
     
  4. Guiyon macrumors 6502a

    Joined:
    Mar 19, 2008
    Location:
    North Shore, MA
    #4
    Not really because, as with any system, physical access trumps all.
     
  5. Ganesha macrumors regular

    Joined:
    Aug 4, 2009
    #5
    Yeah, another massive security flaw is that if someone has your Mac they could also go at it with a crowbar, take out the HD and put it in an enclosure.
     
  6. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #6
    Well its even easier if someone has the OSX disk - just reboot off that and reset the password from there, so I see no difference between the two, other then not needing the install disk
     

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