Create Mac Os X Lion 10.7 Bootable Drive In Windows
Aug 01, 2011 Mac OS X 10.7 Lion downloaded from the Mac App Store; 4GB or bigger USB Flash drive; Get familiar with the following steps and install Mac OS X 10.7 Lion successfully. Look for the Lion Install ESD.dmg file– Once downloading of the Lion OS is complete, navigate the cursor to the Applications folder and search for the Install Mac OS Lion.app. Apr 18, 2012 A bootable Mac OS X thumb drive comes in handy when you need to troubleshoot OS issues for yourself, your family, or your friends. Lion DiscMaker makes it easy to create a bootable thumb drive.
On every OS X Lion installation a hidden partition is created to enable a method for Lion to be reinstalled on the machine, it is known as the recovery partition or drive and is 650mb in size.
If you bought a new machine from Apple you have OS X 10.7 already installed – but no back up disk! and since you haven’t bought the OSX Lion 10.7 App from the App store you can’t re-download it – so thats why you have the recovery drive as a partition in your main hard drive and to boot from it you need to restart the machine holding down “command” + “r” keys.
From recovery mode you can run Disk Utility, get online help and do a restore from a Time Machine backup and re-install Lion leaving all your other files intact – it just replaces the core operating system.
You can make a bootable USB drive or disk of the recovery drive, but involves a small trip to the Terminal….
1) Launch Terminal from /Applications/Utilities and run:
The primary drive in this list is No.2 with the “Identifier” of disk0s2, the boot recovery drive is disk0s3
We can also identify the recovery drive by the name and the size – set at 650mb
2) Mount the drive:
Output should be:
Now the Recovery HD is mounted in the Finder and you can see it in the sidebar under Devices
Navigate to it from the sidebar – Recovery HD/com.apple.recovery.boot/BaseSystem.dmg.
3) Doubleclick BaseSystem.dmg to mount it also in the sidebar. This will mount the volume ” Mac OSX Base System”
mac-osx-lion-base-system
4) Open Disk Utility in /Applications/Utilities
5) Put in a 2GB+ USB drive, let Disk Utility load it. The USB drive needs to be formatted as Mac OS Extended Journaled, if its not, its time to format it in Disk Utility…
6) Finally in still in Disk Utility, select the “Restore” tab – drag the mounted volume “Mac OSX Base System” into the Source field and drag the USB drive “Volume” (mine is called SuperBootUSBDrive) to the Destination.
restore-volume-osx-usb
7) Click Restore – 25 minutes later – One bootable USB drive
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Your bootable USB drive will be called “Mac OS X Base System” after the restore is complete. Now to boot from it just select it as the Start Up disk in System Preferences or hold down option key on boot and select it from the choice of bootable devices.
If you have downloaded the Lion App from the App Store then you can also make a boot disk/drive from this, guide is here, you need to make the boot drive/disk before you install the Lion App, as the installer is deleted after running it. Thats why the guide here can get you out of trouble.
Couple of footnotes on this – Apple has released a knowledgebase article about the recovery partition, also just released from Apple is an app that will do the same as above.
Update For Newer Models – hidden BaseSystem.dmg
Create Mac Os X Lion 10.7 Bootable Drive In Windows 7
If you have the latest models from Apple that came already shipped with OSX 10.7, then you may not have the “BaseSystem.dmg” but instead see a “BaseSystem.chunklist” , the “BaseSystem.dmg” is there it’s just hidden.
To show it so you can see it in the finder – go to Terminal – enter:
Now it will be visible in the Finder.
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Create Bootable Usb Mac Os X Lion From Windows
One of the quirky things with OS X Lion is the lack of a install DVD. You see, Apple don’t really like DVDs. And you can’t blame them either. When was the last time you put a DVD or CD into your Mac? However, it’s nice to have a bootable DVD that features OS X Lion.
With a burnt OS X Lion DVD disc you will be able to reinstall Lion and easily install OS X Lion on any other Mac that you own.
It’s quiet easy to create a bootable DVD of OS X Lion (check out the below instructions and our video further down the page).
Step 1: Download OS X Lion from the Mac App Store
- Press and hold down on the option key on your keyboard, load up the Mac App Store.
- With option key still pressed, go to “Purchased” within the Mac App Store.
- Click on “Install”, enter your password, OS X Lion will now begin to download.
Depending on the speed of your broadband connection, it could take anywhere from 30 minutes to a few hours to complete the 3.75GB download.
Step 2: Copy OS X Lion to your Desktop
Once the OS X Lion download has completed we need to find the necesscary files to burn to the DVD.
- In Finder, go to Applications and right click on Install Mac OS X Lion.app and select “Show Package Contents”.
- Go to Contents > Shared Support
- Copy InstallESD.dmg to your desktop
Step 3: Burn OS X Lion to a DVD
- Open up Disc Utility.app
- Put a blank DVD into your DVD drive.
- InstallESD.dmg should be listed in the left sidebar. If it is, simply click Burn within Disc Utility.
- If InstallESD.dmg does not appear, you can simply right click on the file from your desktop and click burn.
And that’s it. You have just created a bootable OS X Lion installation disc.
Step 4: Install OS X Lion
Once you have OS X Lion burnt to a DVD, you can install or re-install OS X Lion by putting the DVD disc into your DVD drive, and booting up your Mac with the option key pressed. You will then be brought to a screen like the one below where you should choose Mac OS X to boot from. This will start the OS X Lion installation process.
Check out the below video tutorial which guides you through the entire process of creating a bootable OS X Lion DVD disc.