How to Burn an Install DVD / USB Drive for Mac OS X 10.7 Lion Installation

How to Burn an Install DVD / USB Drive for Mac OS X 10.7 Lion Installation

mac os x lion logoThe Mac OS X 10.7 Lion OS has been launched and available in the Mac App Store from where you can download the OS directly and install it, but many would want a clear installation with an option to re-install later and this is where an external drive would be needed. The physical copy of the installation is always required for future use, and using the Disk Utility in your Mac you can create a DVD for the manual installation of the Lion version of Mac OS X.

Why to Burn a DVD or USB Drive for Installation?

  • For future installations, when the Mac is totally corrupted
  • To install it in a hackintosh, or a computer without Mac OS primarily running
  • For a clean installation of Lion OS, rather than just an upgrade of previous version
  • One more big advantage – Using the Disk Utility later, you can recover the backups from Time Machine, and do the same stuff that you used to do in the previous version installation DVDs

How to Burn a DVD for Mac OS X Lion Installation

Note that you need a DVD Drive or USB Drive of a minimum storage of 5GB for the drive installation. And the installer for Lion deletes by itself once the installation of Lion is completed, so it is better to make the DVD before you install the Mac Lion in your Macbook.

mac disk utility

  • Download the OS X Lion from the Mac App Store. You would see the installer app in the list of Applications in your Mac using which you can upgrade to the OS X Lion version.
  • Right-click on the installer and hit “Show Package Contents”. In the Contents > SharedSupport and find the file called “InstallESD.dmg”
  • Open Disk Utility in your Mac
  • In the Disk Utility, drag the downloaded dmg file into the left sidebar, so that you can use it directly to burn into the DVD
  • If you are trying to burn to your DVD, insert the DVD and select the dmg file in the sidebar, then select the Burn button
  • Reboot into the OS X and hold the option key, and from there you can use the burnt disk to install the Mac OS X Lion

How to Burn a USB Drive for Mac OS X Lion Installation

  • Download the OS X Lion from the Mac App Store. You would see the installer app in the list of Applications in your Mac using which you can upgrade to the OS X Lion version.
  • Right-click on the installer and hit “Show Package Contents”. In the Contents > SharedSupport and find the file called “InstallESD.dmg”
  • Open Disk Utility in your Mac
  • In the Disk Utility, drag the downloaded dmg file into the left sidebar, so that you can use it directly to burn into the DVD
  • Insert the USB Flash Drive and select it on the left hand sidebar in the Disk Utility
  • In the Partition tab and select “1 Partition” from the dropdown menu. Choose “Mac OS Extended (Journaled) on the left
  • In the Partition table, under the options you need to select “GUID Partition Table”, so that the drive created would be bootable on a Mac laptop
  • Hit Apply and the content is copied to the USB Drive, and the drive would have only the installation data in it
  • Click on the “Restore” tab, choose the InstallESD.dmg file as the source and your flash drive as the destination
  • Hit Apply and the bootable USB drive would be created

create usb drive data mac lion

As said above, the creation of USB drive or DVD drive is pretty advantageous than the direct upgradation of the previous Mac OS X version to the Lion 10.7 version.

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