How to Burn OS X Lion Install Disk / Make USB Thumbdrive

Wednesday, July 20, 2011
By OP Editor

Guide on how to backup OS X Lion Mac App Store download ‘InstallESD.dmg’ to DVD or thumbdrive.

Mac OS X Lion 10.7 Installer Icon

Download OS X Lion + Find DMG

To save room, Lion deletes the installer after install. So, to backup OS X Lion installer, you need to do the following BEFORE you install it.

  • Download OS X Lion from Mac App Store [$29.99]
  • Look for “Install Mac OS X Lion” in your Application folder
  • Right click (control-click) and select “Show Package Contents”
  • Go into ‘Contents’ folder, and inside ‘SharedSupport’ folder, the Lion installer is inside in a disk image named ‘InstallESD.dmg’
  • Double-click ‘InstallESD.dmg’ to mount it. You can option+drag to somewhere else to copy it.

Burn OS X Lion Install Disk

  • Open Disk Utility
  • InstallESD.dmg should show up on the left pane
  • Burn it at the slowest speed possible to DVD+R or DVD-R

Make OS X Lion USB Thumbdrive Install Disk

  • Get a 8GB thumb drive [from $6 on Amazon] (also works with SD card or Mac formatted harddrive parition).
  • Open Disk Utility. Select the drive or partition.
  • Go to ‘Erase’ tab and choose “Mac OS Extended (Journaled)”. And Erase.
  • Go to ‘Restore’ tab. Drag InstallESD.dmg from left pane into ’source’. Select thumbdrive as destination. Click restore.

Install Lion From DVD or Thumbdrive

  • Remember to backup your current Snow Leopard partition (for example with Time Machine, or with Disk Utility by cloning whole drive to another empty drive or partition).
  • Insert your DVD or attach your thumbdrive. Restart while holding ‘Option’ key. Select the Mac OS X drive and boot from it.

If you want to see the steps with images, see [osxdaily], or comment below for clarifications.

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Tags: Apple, How To, Mac, Tips & Tricks

10 Responses to “How to Burn OS X Lion Install Disk / Make USB Thumbdrive”

  1. Eric_WVGG

    Rather than bounce around the package contents, you can retrieve the installer it from your Time Machine backups.

    1
  2. yceron

    I downloaded already the lion and installed it and i want to burn it into usb or dvd and I can not find the Lion InstallESD.dmg…where is it?

    2
    • Hi yceron,

      After you installed Lion the disk image is deleted to save room.

      You have to download it again from Mac App Store. If you backed up after downloading the file, use time machine.

      2.1
    • yceron

      OP Editor:
      Thank you..Im a beginner on this… Time Machine? I found this link I will try this: [spam]

      2.2
    • If you want to do this AFTER installing (meaning that the mac has deleted the package) go to the app store, hold down ALT and go to the downloads and it’ll let you re download the package.

      2.3
  3. Tip. If you want to do this AFTER installing (meaning that the mac has deleted the package) go to the app store, hold down ALT and go to the downloads and it’ll let you re download the package.

    BOOM!

    3
  4. THX_1138

    Thanks John, saved my bacon with the re-download tip ;-)

    4
  5. does this mean I can share this disc with another computer user? not that I would…

    5
  6. mohsin

    after successfully installing mac os x lion my laptop(acer aspire) keyboard is not working….it says “before you begin connect a keyboard”

    6

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