How do a make a bootable USB key with Lion?

Discussion in 'Mac OS X Lion (10.7)' started by itsjared, Jul 21, 2011.

  1. itsjared macrumors regular

    itsjared

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    Dallas
    #1
    I have downloaded the installer but I have not installed it. I hear that erases the install files.

    Anybody know?>
     
  2. gentlefury macrumors 68030

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  3. OrangeSVTguy macrumors 601

    OrangeSVTguy

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    #3
    You have to save the DMG file or burn the DMG to a disc as the installer will delete itself after you upgrade to Lion.

    It's best to do this after you downloaded but not yet upgrade.

    You can use Apple's Disc Utility to burn the disc image "InstallESG.dmg" to either a properly formated/partitioned USB flash drive, hard drive or blank DVD.
     
  4. itsjared thread starter macrumors regular

    itsjared

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    #4
    i though i remember seeing a step-by-step guide out there somewhere.
     
  5. LoganT macrumors 68020

    Joined:
    Jan 9, 2007
    #5
    By downloading it, and not hitting "Continue to install Lion"

    To the OP here is how you make a Lion flash drive.

    Download Lion from the App Store.
    Go in to your Applications Folder
    In there you will find something called "Install OSX Lion" right click on it and select "Show Package Contents"
    In the SharedSupport folder there is a file called "InstallESD.dmg" hold the option key and drag and drop it to your desktop.

    Open Disk Utility
    Plug in your USB flash drive
    Select your USB flash drive
    Click the restore tab
    Click image and select the InstallESD.dmg from your Desktop
    Drag and Drop your USB flash drive to Destination

    Hit restore.

    Now wait 8 minutes.
     
  6. gentlefury macrumors 68030

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    #6
    Now, how would one get the DMG if its already installed??
     
  7. OrangeSVTguy macrumors 601

    OrangeSVTguy

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    #7
    I think you're SOL, unless you did a Time Machine backup before upgrading.
     
  8. LoganT macrumors 68020

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    Jan 9, 2007
    #8
    Download it again from the App Store. It should be under the purchased tab.
     
  9. gentlefury macrumors 68030

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    #9
    My time machine is always on. Can I roll back my applications folder to before I upgraded?
     
  10. gentlefury macrumors 68030

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    #10
    the app store just says installed and its grey....
     
  11. LoganT macrumors 68020

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    Jan 9, 2007
    #11
    Hmm.

    This would be somewhat unethical, but it's not really if you've already bought it.

    Go to your favorite illegal downloading site and download the Lion DMG.
     
  12. gentlefury macrumors 68030

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    #12
    I know of a site that has every available release (public or not) of OSX, iOS and applications, but I would rather get the one I downloaded, so I know it is exact.

    I might try peaking into the applications folders past...that could work.
     
  13. OllyW Moderator

    OllyW

    Staff Member

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    #13
    I only read this thread just after I started to install Lion.

    No worries though, Time Machine saved the day. :D
     
  14. OrangeSVTguy macrumors 601

    OrangeSVTguy

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    #14
    LOL +1 for TM.
     
  15. gentlefury macrumors 68030

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    Los Angeles, CA
    #15
    So you were able to retrieve the file from before it installed? I'm going to have to try that when I get home. Gotta remember what time I installed it...lol
     
  16. OllyW Moderator

    OllyW

    Staff Member

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    Location:
    The Black Country, England
    #16
    I was lucky, I just clicked on Latest Backup and it was there. :)
     

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