![]() Use the 'createinstallmedia' command in Terminal You will create the bootable installer from this app, not from the disk image or. It installs an app named Install OS X El Capitan into your Applications folder. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. Apple also offered another marginal update on the Mac OS X Mountain Lion download called the Mountain Lion version 10.8.1.Įl Capitan downloads as a disk image. Future updates starting from the OS X Mavericks were all free. Coincidentally, the Mac OS X Mountain Lion download was the last paid upgrade to an OS X release. ![]() Starting with OS X Lion, Apple did away with DVDs and other media as a method of installing software and switched to a download model instead.Even so, it's still easy to create a USB installation disk for OS X Lion if you want to install Lion on a freshly formatted hard drive, if you're in an emergency booting situation, or if you need to repair your Mac's hard drive. ![]() Download Mac OS X Lion from the Mac App Store ($29.99) From the Mac OS X Finder, locate the Mac OS X Installation file that was downloaded, right-click, and “Show Package Contents” Find and open the “SharedSupport” folder and locate a disc image file called “InstallESD.dmg”.
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