When the DVD is done burning, it will automatically eject. This process could take 20 minutes or more. Insert a blank DVD, and click the Burn button. Select InstallESD.dmg and then click on the Burn icon in Disk Utility. Now you’ll have a bootable OS X Lion image on USB. Warning: This will erase all contents on your USB drive! Navigate in the Finder to Applications>Utilities and launch Disk Utility.Ĭlick and drag your USB drive (in this case it’s called “8.03 GB Corsair Voyager”) into the Destination field. You’ll have to wipe the drive in order to put the Lion installation on it. Note: You’ll first want to save all information on the drive. Burn image to a USB drive using imageusb under Windows. If you wish to use DVD, then skip to the part where you’ll insert your DVD. This is the only image that I have been able to use to install Lion on a 1st Generation Intel Mac Pro with an empty hard drive. First I’ll show you how to do this using a USB drive. This is where you’ll have the choice to either create your Lion installation on a USB drive or a DVD. Navigate to Applications>Utilities in the Finder and launch Disk Utility. Then click on Edit again and choose Paste Item. Now, with this file selected, click on Edit in the menu bar at the top of the screen, and select Copy InstallESD.dmg.Ĭlick on your desktop wallpaper so the menubar at the top says Finder. Now hold down the control key while clicking on the Install Mac OS X Lion icon, and choose Show Package Contents.įind and double-click on the Shared Support folder.Ĭlick once on the InstallESD.dmg file to select it. Once it’s done downloading, go to the Finder and look for the Install Mac OS X Lion icon in the Applications folder. This will take some time, so you might want to do something else and come back to it awhile later. It will be located on the right hand side under Quick Links.Īfter clicking download, you’ll be taken to Launchpad (if you’re already using Lion). Launch the installer and upgrade to Mac OS X Mountain Lion.First launch the Mac App Store and find OS X Lion. Copy the “Install OS X Mountain Lion.app” onto the Applications folder of this Mac. Disconnect the external storage from the source Mac and plug it into the recipient Mac. On the Source Mac, open Applications folder and look for “Install OS X Mountain Lion.app“ Plug in your external storage device and copy/burn the installable onto it. Mind you, the OS X 10.8 installable is almost 4.05GB, so you need to have a storage bigger than that (at-least 4.25GB). This method involves copying the Mountain Lion installable onto an external storage device like a USB stick or a DVD drive. In case your Macs are not on the same network, check out the alternate method. Once the file is copied, launch the installer to upgrade to Mountain Lion. Now on your shared Mac, navigate to Applications folder, and drag & drop the Install Mac OS X.app file. Go to your Applications folder and look for “Install OS X Mountain Lion.app“ Press Command+K to Connect to server and then click on Browse to find the other shared Macs. Choose Mac OS Extended (Journaled) as the Format, and name the USB key what you want. It’s called Install Mac OS X Lion.app and it should have been downloaded to /Applications. Select your USB drive from the left side of Disk Utility, then click on the Erase tab. Once you’ve purchased Lion, find the Lion installer on your Mac. Make a bootable drive of Mac OS X Mountain Lion with a USB drive.Download a copy of Mac OS X Mountain Lion. Next, we format the USB flash drive, this will become the bootable Lion installer: Plug the USB flash drive into your Mac. Enable File Sharing by clicking on the checkbox next to it. Recommended Reading: How to Clean Install OS X Mavericks 1. On the source Mac, launch System Preferences and click on Sharing. This is because, Mac OS will delete the installer once the installation is complete. Assuming that you have both (or all) your Mac(s) on the same network, you can simply enable File Sharing to copy the installable.ĭownload Mac OS X 10.8 Mountain Lion from Mac App Store. This is the simplest of the 2 methods we have. Download Mac OS X Lion Download: Mac OS X Lion This downloads as a disk image named InstallMacOSX.dmg. Install or Upgrade OS X Mountain Lion on More than One Computer # Method 1: File Sharing over the network # If you have a good broadband internet & don’t have to worry about the bandwidth, then you can open the Mac App Store on your other Macs, go to Purchases tab and you can re-download Mac OS X Mountain Lion on each of your computers. The personal use license which came into effect from Mac OS X 10.7 Lion, permits users to purchase once and install the OS on all their computers authorized for personal use. Apple has just released the Mac OS X 10.8 Mountain Lion and I’m sure many of you who own multiple Mac computers will be worrying about purchasing multiple licenses of Mountain Lion in order to install it on all your computers.
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