Creating and installing OS X Lion from a bootable USB drive or DVD

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  1. You will need to locate the OS X Lion installation package on your Mac. The easiest way to do this is to Option + click its icon on your dock and choose Options>Show in Finder.
  2. Once you’ve located the package, Option + click it and choose Show Package Contents.
  3. Open the folder titled ‘SharedSupport’ and find a file called ‘InstallESD.dmg’. This file contains everything you need to boot up a computer and install OS X Lion. Drag this file out to your desktop or another easy to find location.
  4. At this point, if you just want to make a DVD, open up Disk Utility on your Mac, find this image in the list on the left, Option + Click on it and click ‘Burn’. You’ll have a bootable DVD.
  5. Now prepare a USB thumb drive at least 8GB in size by opening up the Disk Utility application on your Mac, plugging it in and choosing to Partition it in a 1 Partition scheme. Note that this process will erase your thumb drive, so make sure you’ve backed it up.
  6. Highlight the single partition and use the pull-down menu to select ‘GUID Partition Table’ as the type and click ok.
  7. Name the USB drive anything that you would like, make sure that the Format option is set to ‘Mac OS X Extended (Journaled) and click the Apply button.
  8. Now, click on your new partition and click on the Restore tab at the top right. In the Source section, click on Image and choose the ‘InstallESD.dmg’ file from step 3.
  9. Make sure that the Destination field displays the name of your USB drive and click Restore. You will be prompted to enter the password for your Administrator account. Once you’ve done so the copying process will begin.
  10. Once the process is complete, you can verify the bootable status of your drive by selecting it and clicking Info in Disk Utility. Bootable status should show ‘Yes’.

Now that you have a bootable USB drive (or DVD) that contains OS X Lion, you can boot from it by plugging it in to any Mac and holding down the Option key while its booting. Once the screen appears that asks you which volume to boot from, choose the bootable OS X Lion drive. This will enable you to install OS X Lion on any compatible Mac without using the standard upgrade procedure. If you’re the kind of user who likes to perform a clean install instead of an upgrade, this is a great option for you.

(via The Next Web)

Author: Jas Dhaliwal

Jas Dhaliwal is a highly experienced International Social Media Strategist. He specializes in building and engaging with social communities across the web. Born and bred in London, he is passionate about technology and social anthropology. You can follow @Jas on Twitter

Author: Jas Dhaliwal

Jas Dhaliwal is a highly experienced International Social Media Strategist. He specializes in building and engaging with social communities across the web. Born and bred in London, he is passionate about technology and social anthropology. You can follow @Jas on Twitter