Apple released Mac OS X Lion version 10.7, available from the online Mac App Store. You can buy Lion on your Mac App Store, like you buy other applications. Once you bought, your download will start in no time. But what if you have more than one Mac on your house? Do you need to download all over again on each mac? Do you need to copy paste installer on every Mac?
Answer is NO, you can either burn your download in to Bootable Disc (Check the article here) or follow the following instructions to create bootable Mac OS X Lion 10.7 USB Stick or External Drive.
Step 1: Purchase Mac OS X Lion from the Mac App Store.
Step 2: Right click on “Mac OS X Lion” installer and select “Show Package Contents.”
Step 3: Navigate to SharedSupport >> InstallESD.dmg (Lion boot disc image)
Step 4: Double-click it and it will mount the Lion disk image onto your Mac desktop.
Step 5: Now plug your USB flash or external hard drive in to Mac and launch Disk Utility from the Utilities.
Step 6: Select your USB drive from the left side and click on the “Erase” tab while making sure you choose “Mac OS Extended (Journaled)” as the Formatting option. Check the following screenshot for your reference.
Step 7: Once the format process completes, Select the USB drive in Disk Utility and click on “Restore”.
Step 8: Now drag and drop the already mounted “Mac OS X Install ESD” image into the “Source” field and USB / External Drive as Destination and hit the Restore button. Check the following screenshot for your reference.
That’s it, you just created your very own bootable Mac OS X Lion USB installation drive, now you can install Mac OS X 10.7 Lion USB drive. Simply plug it in, hold down the Option key during boot and select the drive to begin installation.