Mac OS X Lion Retail Bootable .iso
How to Create a Bootable Flash Drive with Mac OS X Lion
Mac OS X Lion is the eighth major release of Apple's operating system for Mac computers. It was released in July 2011 and introduced many new features, such as Launchpad, Mission Control, AirDrop, and FaceTime. However, unlike previous versions of Mac OS X, Lion was not available on a physical disc. Instead, it was distributed through the Mac App Store as a digital download.
This posed a problem for some users who wanted to install Lion on multiple Macs, or perform a clean install without an Internet connection. Fortunately, there is a way to create a bootable flash drive with the Mac OS X Lion installer, which can be used to install or reinstall Lion on any compatible Mac. In this article, we will show you how to do it step by step.
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What You Need
A Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
OS X Snow Leopard 10.6.6 or later or OS X Lion 10.7 already installed
2GB of memory
7GB of available space
A USB flash drive with at least 8GB of capacity
The Mac OS X Lion installer file (InstallESD.dmg), which can be downloaded from the Apple Support website or extracted from the Install Mac OS X Lion.app file in the Applications folder if you have purchased Lion from the Mac App Store
How to Format the Flash Drive
Before you can copy the Lion installer to the flash drive, you need to format it for Mac using the Disk Utility app, which can be found in the Utilities folder inside the Applications folder. Here are the steps to format the flash drive:
Connect the flash drive to your Mac and launch Disk Utility.
Select the flash drive from the list of drives on the left pane.
Click on the Partition tab at the top.
Under Volume Scheme, choose 1 Partition from the drop-down menu.
Enter a name for the volume, such as "Lion Installer".
Under Format, choose Mac OS Extended (Journaled) from the drop-down menu.
Click on the Options button at the bottom and make sure GUID Partition Table is selected as the partition scheme. This will make the flash drive bootable on Intel-based Macs.
Click on Apply to confirm and start formatting the flash drive.
How to Copy the Lion Installer to the Flash Drive
Once you have formatted the flash drive, you can copy the Lion installer file (InstallESD.dmg) to it using Disk Utility. Here are the steps to copy the Lion installer to the flash drive:
Open Disk Utility again if you have closed it.
Drag and drop the InstallESD.dmg file from its location to the left pane of Disk Utility under the flash drive. This will mount it as a virtual drive.
Select the flash drive from the list of drives on the left pane.
Click on the Restore tab at the top.
Drag and drop the InstallESD.dmg volume from the left pane to the Source field on the right pane.
Drag and drop the flash drive volume from the left pane to the Destination field on the right pane.
Check the box that says Erase destination before restoring.
Click on Restore to confirm and start copying the Lion installer to the flash drive.
How to Boot from the Flash Drive and Install Lion
After you have copied the Lion installer to the flash drive, you can use it to boot your Mac and install Lion. Here are the steps to boot from the flash drive and install Lion:
Shut down your Mac and insert the flash drive into a USB port.
Turn on your Mac and hold down the Option key as soon as you hear the startup chime. This will bring up a screen where you can choose which device to boot from.
Select the flash drive icon labeled "Lion Installer" and press Enter. This will boot your Mac from the flash drive and launch the Lion installer.
Follow the on-screen instructions to install or reinstall Lion on your Mac. You can choose to upgrade your existing system, erase and install a fresh copy, or customize your installation options.
When the installation is complete, your Mac will restart and boot into Lion.
Conclusion
In this article, we have shown you how to create a bootable flash drive with the Mac OS X Lion installer, which can be used to install or reinstall Lion on any compatible Mac. This can be useful if you want to install Lion on multiple Macs, perform a clean install without an Internet connection, or have a backup of the Lion installer in case you need it in the future. We hope you found this article helpful and informative. If you have any questions or comments, please feel free to leave them below.
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