Erasing a computer before selling it

Discussion in 'Mac Basics and Help' started by c-t, May 8, 2012.

  1. c-t macrumors newbie

    Jul 29, 2010
    I will soon be selling my old iMac (first-gen Intel).

    I booted it from the Snow Leopard drive, went to Disk Utility, and then did a 7-pass secure erase of the internal hard drive. It took many hours.

    This should be safe, right? How can I be sure? Can Disk Utility really be trusted? Has someone actually done some research into the security of this?

    Also, I have reset my firmware password to none. Are there any other things I should consider before selling the computer?
  2. pdjudd macrumors 601

    Jun 19, 2007
    Plymouth, MN
    Disk Utility uses standard DOD 5220-22 M standard for it's seven pass system. It's good enough for the government to use and IMO is way overkill.

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