"Install Mac OS X Lion" versus "InstallESD.dmg"

Discussion in 'Mac OS X Lion (10.7)' started by mekkon, Aug 29, 2011.

  1. macrumors newbie

    Joined:
    May 6, 2004
    #1
    I recently bought Lion, and am upgrading my machines. I have an iMac which isn't connected to the internet that I want to upgrade. (It is located in a camp where internet isn't available...)

    I read all about how to do it after I purchased Lion on my macbook pro, by using the same install file. However, there seem to be two competing ideas out there. After downloading Lion, I saved the "Install Mac OS X Lion" app that is placed in the Applications folder. I also unpacked it and saved the InstallESD.dmg file seperately. I've burned both to DVD.

    Which one should I use, and what are the differences or implications of using either? From what I've read:

    • Install Mac OS X Lion - This is the exact file downloaded from the App Store, and may or may not include personal information in the attached files.
    • InstallESD.dmg - This is the file packaged within the above. It is the actual installer, and is identical to what anyone who has installed Lion uses. It can be burned to a DVD to create a bootable copy, and (maybe?) for a fresh install on a blank drive.

    From my research - and various threads here - it seems as though either of them can/should be copied to my iMac's Applications folder and run from there. But which is best, and why? Or can I update directly from the bootable InstallESD DVD? Thanks!
     
  2. macrumors demi-god

    Hugh

    Joined:
    Feb 9, 2003
    Location:
    Erie, PA
    #2
    You can use the bootable disk you made to do the install on your other machine.

    Hugh
     
  3. macrumors 6502

    Joined:
    Oct 30, 2010
    Location:
    Turkey
    #3
    If you will upgrade, copying Install Mac OS X Lion.app to other computer and running it is the best solution.

    If you will clean install, burning InstallESD.dmg to DVD or a USB stick is the best solution.
     
  4. macrumors 68030

    Taz Mangus

    Joined:
    Mar 10, 2011
    #4
    The difference between the two is that after the "Install Mac OS X Lion" has completed it erases itself. Hence, you will loose the ability to do another Lion install unless you re-download it again.

    I keep the "Install Mac OS X Lion" around on my Applications folder. I also made a bootable drive using InstallESD.dmg. I have three Mac computers so having the bootable Lion install drive makes it easy to install/re-install on all Mac computers.

    I keep the "Install Mac OS X Lion" as another backup copy just in case I need InstallESD.dmg again.
     
  5. thread starter macrumors newbie

    Joined:
    May 6, 2004
    #5
    So can the InstallESD.dmg be used to update a Snow Leopard machine to Lion, or can it only do a clean install? And can it be run from the disc, or must it be copied to the Applications folder like the "Install Mac Os X Lion" installer?
     
  6. macrumors 68030

    MrCheeto

    Joined:
    Nov 2, 2008
    #6
    I made a post about this exact topic. Read to learn how to use InstallESD.dmg.
     

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