The Lion installer you just downloaded can then be found by navigating to the external drive's Applications folder. If you wish to boot back into Lion before finishing the tutorial, you can simply restart your Mac holding Option, and this time choose your main hard drive. Quit it and extract InstallESD.dmg from the Install Mac OS X Lion file found in Applications, as described above. When it's finished downloading, the installer starts automatically. Lion is available to download you won't have to pay for it again. Copy InstallESD.dmg to your Mac OS X Desktop, this is the Lion disk image and what you’re going to. Find and open the SharedSupport folder and locate a disc image file called InstallESD.dmg. Update to 10.6.8 using Software Update, and open the Mac App Store. From the Mac OS X Finder, locate the Mac OS X Installation file that was downloaded, right-click, and Show Package Contents. Choose to boot from Mac OS X Install DVD, and when instructed, install Snow Leopard on the external drive.Īfter your Mac reboots from the newly installed version of Snow Leopard, follow the on-screen prompts to set it up, as you would a new Mac. With your Snow Leopard install disc in the optical drive, restart your Mac with the Option key held down.
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