Now open up DiskMaker X and choose Mavericks (10.9).It will find the installer file in your Applications folder. Step 1: Download & Install DiskMaker X. createinstallmedia, El-Capitan, Lion, Mavericks, Mountain-Lion, Tips, USB, Yosemite, アプリ, インストールディスク @applechinfo スポンサーリンク Amazonのタイムセールで新しいMacBookも充電可能な「Anker PowerCore+ 20100 USB-C」などが特別価格で販売中。 Also, make sure you already have the Install OS X Mavericks file there, too, and a properly formatted USB drive before continuing.. While downloading an OS X or macOS version offers instant gratification, it means you're left without an installer. Step 2: Run Through the Easy Instructions. Just download DiskMaker X 3 and install it to your Applications folder. This step-by-step procedure will teach you how to create a bootable USB drive installer for Mac OS X El Capitan.This method will also work for the other iterations of OS X (including the Yosemite, Mavericks, and Mountain Lion updates). From here you can format, restore from backups, or reinstall Lion. If you’re wondering about the other drives pictured, it’s because I am dual booting Lion and Snow Leopard, and “Recovery HD” is the small recovery partition that Lion installs on its own.This process should work with a standard external USB hard drive too, but I have not tried that specifically. With the arrival of OS X Lion in 2011, Apple changed its software-delivery method to a download model with the Mac App Store instead of using physical DVDs and other media.