Resolved External Hard Drive not being detected in Mac

Discussion in 'MacBook Pro' started by Chiuy, Aug 13, 2011.

  1. Chiuy, Aug 13, 2011
    Last edited: Aug 13, 2011

    Chiuy macrumors 6502

    May 24, 2011
    NorCal, Bay Area
    I downloaded the Lion Recovery Disk onto my External hard drive (500GB Western Digital), and it ONLY works when I plug it in when I need to reinstall the Mac OSx Lion. But it does NOT work when I plug it in normally to use it as a storage drive.

    A little help here?
    Why isn't it detecting?
    It works... but not detecting.
    Same with Windows, it's not detecting the external hard drive.
  2. gorskiegangsta macrumors 65816


    Mar 13, 2011
    Brooklyn, NY
    Did you merely move the .Dmg file to the drive, or did you install it to that drive? If the latter, then it is likely that the drive will be unusable until formatted. If I'm not mistaken, the Lion Recovery Disk makes an invisible drive/partition that can only be accessed on boot.

    Try to see if Disk Utility spots the drive.
  3. Chiuy thread starter macrumors 6502

    May 24, 2011
    NorCal, Bay Area
    Disk Utility recognize my drive, the name is on there, but how do I reformat it?

    Edit: Nvm, I think I got it, lettme see how this goes.

    Edit2: Awesome, thanks. Resolved.

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