How to create a lion boot disk

Discussion in 'Mac OS X Lion (10.7)' started by vomer, Jun 7, 2011.

  1. macrumors member

    Joined:
    Sep 13, 2007
    #1
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5)

    Here we go:

    [ Lion Boot Disk ]
    Purchase and download Lion from the Mac App Store on any Lion compatible Mac running Snow Leopard.

    Right click on “Mac OS X Lion” installer and choose the option to “Show Package Contents.”

    Inside the Contents folder that appears you will find a SharedSupport folder and inside the SharedSupport folder you will find the “InstallESD.dmg.” This is the Lion boot disc image we have all been waiting for.

    Copy “InstallESD.dmg” to another folder like the Desktop.

    Launch Disk Utility and click the burn button.

    Select the copied “InstallESD.dmg” as the image to burn, insert a standard sized 4.7 GB DVD, and wait for your new Lion Boot Disc.
     
  2. macrumors regular

    Joined:
    Feb 28, 2011
    Location:
    Shanghai, China
    #2
    And is it possible (and how) to make a clean install from that boot disk or from a "restored" dmg image?
    Thanks a lot!
     
  3. macrumors 6502a

    (marc)

    Joined:
    Sep 15, 2010
    Location:
    the woods
    #3
    Exactly, is it possible to install Lion without having any OS installed?
     
  4. macrumors newbie

    Joined:
    Oct 27, 2009
    Location:
    UK
    #4
    I 2nd that, or is it 3rd.

    Pure speculation on my part, but maybe you can purchase a DVD at or cost, or even some kind of boot disk to download the installation on the fly. Much like Linux has done for years...

    Would be nice to have some official word regarding this from God himself. WWDC raised a few questions in my mind regarding Office/Enterprise distribution.
     
  5. macrumors regular

    Joined:
    Apr 6, 2006
    #5
    it is possible to clean install with a burned disc of DP4... i did it on 2 machines. so i'd hope they'll leave that in for the final version as well.
     
  6. macrumors Nehalem

    GoCubsGo

    Joined:
    Feb 19, 2005
    #6
    If you can make a bootable DVD then it's good. I've made a backup bootable DVD of snow leopard, even made a bootable flash drive for a hackintosh. If Lion somehow prevents this then buying a new HDD or in my case a new SSD would seem impossible if I wanted my OS on it.
     
  7. macrumors 6502a

    (marc)

    Joined:
    Sep 15, 2010
    Location:
    the woods
    #7
    I can confirm from my fresh Lion install that this is possible. I used this guide but it might as well work out of the box...
     
  8. macrumors newbie

    Joined:
    Mar 7, 2008
    #8
    I tried following this but the DVD's that I created were not bootable. What am I doing wrong?

     
  9. macrumors 68040

    xgman

    Joined:
    Aug 6, 2007
    #9
    Are you sure you burned this a an "Image" and not just burned the dmg to the dvd?
     
  10. macrumors 6502a

    rmbrown09

    Joined:
    Jan 25, 2010
    #10
    I open package contents on the installer but I cannot find the folder you specify... Where exactly is it? Am I clicking the wrong thing?
     
  11. macrumors newbie

    Joined:
    Feb 16, 2008
    #11
    my steps was

    1) make new partition for a Lion
    2) inside SL, install the lion from InstallESD.dmg
    3) back to SL copy InstallESD.dmg to my external hard
    4) backup my files from SL
    5) inside Lion, Erase SL partition "Optional"
    6) resize the Old partition to Lion

    now everything works fine with me
     
  12. macrumors newbie

    Joined:
    Mar 7, 2008
    #12
    Yes, because the DVD does not contain the DMG but the folders inside the DMG

     
  13. macrumors 6502

    JoshBoy

    Joined:
    Oct 12, 2008
    Location:
    Sydney, Australia
    #13
    can this be done on a usb stick at all?
     
  14. macrumors 6502a

    Joined:
    Jun 9, 2004
    Location:
    London ish
    #14
    That's a very good question.
     
  15. macrumors 6502a

    rmbrown09

    Joined:
    Jan 25, 2010
    #15
    Yep, I have an Air so had to do it this way.

    Once you have the .dmg (However you obtained it)

    Open disk utility and click your USB.

    This is mine, I have 2 partitions on my 320GB External HDD, works the same on a USB though.

    Click your partition, not the overhead name of the drive.
    In this case I would select "Other" or the "Install ESD" (Although that is my current 10.7 installer)

    Go to restore and select the 10.7 dmg as your source, the partition as the destination. Done.

    [​IMG]
     
  16. macrumors regular

    Joined:
    May 27, 2009
    #16
    bump it to the top
     
  17. macrumors regular

    Joined:
    Jan 27, 2007
    #17
    where does lion download to?
     
  18. macrumors 6502a

    Joined:
    Jun 9, 2004
    Location:
    London ish
    #18
    Looks like this is not so much of an issue any more, since Apple just announced today that from August you will be able to buy Lion on a USB stick for something like $69? :)
     
  19. macrumors newbie

    Joined:
    Jul 20, 2011
    #19
    How about AFTER you install Lion?

    How do I create a boot disk if I realized I wanted one AFTER I upgraded to Lion? I tried re-downloading the installer from app store and it will not let me.
     
  20. macrumors 6502a

    Joined:
    May 2, 2007
    #20
    I'm in the same boat. I didn't realize the installer would be deleted after upgrading.:(
     
  21. macrumors newbie

    Joined:
    May 17, 2011
    #21
    Same here, any ideas people?
     
  22. macrumors member

    Joined:
    May 28, 2010
    #22
    Yes, the installer gets deleted after the installation. I used Time Machine to backup my whole system right before I installed Lion and also copy the installation package to a USB.

    Once you finished downloading Lion, it should appear in your Applications folder.

    Make sure you backup the installation package before you install or else you won't have a chance to back up it later.
     
  23. macrumors 68000

    definitive

    Joined:
    Aug 4, 2008
    #23
    Where is the installation app downloaded to?
     
  24. macrumors regular

    Joined:
    Jan 27, 2007
    #24
    So basically if you didn't back it up before installing it you've got no chance of doing a clean install at a later date?

    Not impressed about this.
     
  25. macrumors newbie

    Joined:
    Jun 5, 2011
    Location:
    Folsom, Ca
    #25
    If I had to guess, it disappears the installer data into another partition
     

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