Mac Os X Lion Bootable Usb Download for Free Updated

Mac Os X Lion Bootable Usb Download for Free

Mac OS X Lion Install USB Boot Drive

I'g going to walk through the procedure of making a bootable Mac Bone Ten x.seven Panthera leo installation drive out of whatever USB flash drive cardinal. This is similar to the process of making a bootable Lion installer DVD, simply I prefer a USB flash drive considering it's faster, smaller, and I take a MacBook Air then an installation DVD isn't too useful for me.

This is pretty piece of cake to do, but I accept fabricated the walkthrough equally simple every bit possible with plenty of screenshots, so simply follow along the instructions.

Requirements:

A Mac with Mac OS 10 10.half dozen.8 so you tin download and access Lion
8GB+ USB flash key drive, these are inexpensive and ubiquitous on Amazon.com
Download Mac OS Ten Lion from the Mac App Shop ($29.99)

Got all that? Good, let'southward proceed.

How to Create a Bootable Mac OS X Lion Installation USB Drive

We're going to assume you already have Mac OS Ten Lion downloaded from the App Store, if yous don't, exercise that offset. If you have anything stored on the USB flash bulldoze y'all're going to lose it, and then be prepared for that and back information technology upward.

First we are going to locate the Panthera leo InstallESD.dmg file and mount it:

Navigate to your applications folder
Right-click (or control-click) on the "Install Mac OS X Panthera leo.app" and select "Show Package Contents"
Open the "Contents" directory and then go into "SharedSupport"

Lion InstallESD.dmg location

Double-click on "InstallESD.dmg" to mount the Lion disk prototype onto your Mac desktop, information technology will show up like the prototype beneath

Mac OS X Lion Installer mounted on Mac OS X Desktop

Side by side, nosotros format the USB flash bulldoze, this will get the bootable Lion installer:

Plug the USB flash drive into your Mac
Launch Disk Utility
Select your USB drive from the left side of Disk Utility, then click on the "Erase" tab
Choose "Mac OS Extended (Journaled)" every bit the Format, and proper name the USB key what y'all want
Click on "Erase" to format the USB drive

Format a USB Key to create a Bootable Lion Installer Drive

Now that the USB wink drive has been formatted to the appropriate filesystem, we are going to restore the previously mounted InstallESD.dmg file to the bare USB drive.

Right-click on the USB drive in Disk Utility and select "Restore"

Restore Lion installer DMG to USB drive

Now you need to fix the source deejay for the restore. This is why we mounted the InstallESD.dmg file earlier, considering we can just drag and drop the "Mac OS X Install ESD" image into the "Source" – if you didn't mountain the image, you can manually locate and select the epitome file yourself by clicking on "Prototype"

Select the OS X Lion installer as source

Elevate the formatted USB key to the "Destination" and check "Erase destination"
Be certain you have the right things in the correct places, yous don't desire to format the wrong bulldoze – so click on "Restore"

Now you wait while the Panthera leo DMG is restored to the USB bulldoze, this tin can take a while and you'll come across a screen similar this:

Create a Bootable Lion Installer Drive

When this is finished, your bootable Mac Bone X Lion installer drive is complete! You can now kicking any Lion compatible Mac with the USB drive, just plug the USB primal in, concord downwardly Option during initial kicking, and select the drive. Here'south what you'll see upon booting with the drive connected:

Boot Lion USB Installer

From here yous can format, restore from backups, or reinstall Lion. If you're wondering about the other drives pictured, it'due south because I am dual booting Panthera leo and Snow Leopard, and "Recovery Hd" is the small recovery sectionalization that Lion installs on its own. This process should piece of work with a standard external USB hard bulldoze too, simply I have not tried that specifically.

Advantages to making a bootable Lion USB bulldoze:

You lot can perform a clean OS X Lion install with the USB drive
The Lion USB key drive becomes a recovery disk with access to Disk Utility, re-installation, access Fourth dimension Machine backups, and everything the Recovery HD partition does
You volition have external media to recover and reinstall Lion in the upshot of full drive failure or some other ending

Enjoy Mac Bone X 10.7 Lion!