Is this possible? Installing OS X Lion

Discussion in 'macOS' started by js2131, Jul 26, 2012.

  1. js2131 macrumors newbie

    Jul 26, 2012

    I upgraded to Mountain Lion earlier and my question is....

    is it possible for me to install OS X Lion 10.7 back onto my MBP with the following.

    I have a OS X Lion Install DMG ( around 4.3gb )
    External 250gb HD ( 100gb is full of data ) I dont want to delete it!.

    I am not very experienced and would appreciate if someone could give
    me the some basics on how this can be done or if its even possible?
    I do not want to lose any data on my external HD.

    I just want to know if i can get clean install of Lion 10.7 back on my mac.

    I do not have a flash drive. :(

  2. Icy1007 macrumors 65816


    Feb 26, 2011
    Cleveland, OH

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