Disk Utility - "Security Options" grayed out

Discussion in 'Mac Basics and Help' started by macman221285, Oct 6, 2009.

  1. macman221285 macrumors newbie

    Joined:
    Oct 6, 2009
    #1
    Hi,

    I am trying to 'Erase free space' using the disk utility on my macbook. I have read that you can choose to 'overwrite with zeros' via the 'Security options' tab. However, my 'security options' tab is grayed out (see pic below). Please can you tell me how I can access the 'security options' and therefore free the disk space and overwrite with zeros??
     

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  2. zrbecker macrumors member

    Joined:
    Jun 28, 2009
    #2

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