Apple recently released OSX Lion, this version of OSX is the first one from Apple to only be available from the Mac App Store. However, there have been some people who don’t have an internet connection with enough speed to download it. There may also be some who have the speed, but don’t want to download it so many times just to install it on the other computers that they own.
If you have downloaded yuor copy of OSX Lion from Apple’s Mac App Store, Don’t install it yet! I will make my reasons clear why you shouldn’t do so in a moment. I am not stopping you from downloading it. If you wish to download it first, then do so because you will need it.
When you download any application from the Mac App store, each of them have a folder which stores everything the application needs to run. Inside the file structure for the OSX Lion installation download, there is a .dmg(AKA disk image) file which you can copy to a DVD or a USB flash drive. Through this process, you can create your own OSX Lion installation DVD or USB flash drive. So here are the pre-requisites that you need in order to carry out the job:
- OSX Snow Leopard already installed on your mac
- You should have already paid for and downloaded OSX Lion from the Mac App Store
- A blank USB flash drive or a single layer DVD (If you have data on the USB flash drive that you will use, I suggest backing up the data on it before carrying out the procedure).
Step 1: Assuming that you have the above in place, let’s go! First you will want to click on the Applications folder and right-click(AKA ctrl-click) on the Lion Installer and select “show package contents”. A new Finder window will open up.
Step 2: Double click on contents and click on SharedSupport. You will find a .dmg file called “InstallESD.dmg”. I want you to make a copy of that to your desktop.
Now remember I asked you to keep a blank USB flash drive or single layer DVD ready? This is where you will need to insert it. So before going any further, insert it right now.
For a DVD disk, look at step 3. For a USB Flash Drive, look at step 4.
Step 3: To burn a single-layer DVD, insert it into your mac. From there, you should open up the Disk Utility application. Once it has opened, click the “Burn” button at the top left-hand corner of the window. From there, find the InstallESD.dmg file and select that. By default, it should select the optical disk drive(superdrive) on your mac. From there, click on the arrow immediately next to where it says the word “superdrive” or the name of your optical drive. Under “burn options”, you should see a box which will allow you to choose the speed. Click on it and select 4x. Once you have done that, click “Burn” at the bottom right-hand corner of the window. Be sure to name your USB appropriately(e.g. Lion install USB, OSX Lion Installer).
Step 4: The USB Flash Drive route is slightly different. As with step 3, launch the Disk Utility and make sure you have your USB Flash Drive plugged in. Select it from the left-hand sidebar in the Disk Utility Window. Go to the Partition tab and select “1 Partition” from the dropdown menu. Choose “Mac OS Extended (Journaled) on the left. Click erase so that your USB Flash Drive can be made ready. Be sure to name your USB appropriately(e.g. Lion install USB, OSX Lion Installer)
Step 5: Click on the “restore” tab at the top of the window, then select the “image” button. This is located immediately next to the “Source” box. This will open up a new window. From here, you want to find the “InstallESD.dmg” file which was on your desktop. So select deskotp from the Left-hand portion of this window. You should see the DMG file that you copied earlier. select that and click “Open”.
Step 6. From the left-hand side of the disk-utility , click and drag your USB flash drive to the “destination” box. Be sure to tick the box beneath the ”destination” box. Once you have done that, click restore. This will take some time, so I suggest leaving it to work its magic.
Step 7: Shut down and keep your Lion install USB FlashDrive plugged in or dual-layer DVD inserted. Shut down your mac as you normally would. Once it has shut down, power it up again. When you hear the normal “chime” that sounds when you power up your mac, hold down the option/alt key on your keyboard. You should be able to see your newly made OSX Lion install disk. You want to select that. From here, you can go ahead and install OSX Lion.
So there you have it. You now have your very own OSX Lion install DVD or USB Flash Drive. You can use this to install OSX Lion on up to five authorised Macs
Now a lot of you may be wondering “Is this kind of thing legal? Is this considered OK to do within Apple’s licensing aggreement?”. Well, I have taken the liberty of reading the end-user license agreement(EULA) for OSX Lion and it said that you can make one copy of Apple software for backup purposes. As long as you don’t give this OSX Lion install DVD/USB Flash Drive to anyone else, then you are staying within the rules.
In English, that means you can make one USB Flash Drive or single layer DVD for installing OSX Lion.
Disclaimer: I don’t condone, promote, endorse, glorify or advocate using, creating “hackintoshes” (Windows PCs that can run OSX), or piracy. I cannot be held responsible for any damage that could be caused in carrying out this procedure to your mac, other computer, hard drives, or USB Flash Drives