If you have trouble with DiskMaker X here is a way to do it using the built-in Disk Utility in OS X. Copying installer files to disk.Īnd after half an hour or so the USB drive will be a bootable OS X El Capitan Installer that you can use to install or upgrade OS X!įor more info check out the Apple Support article here: Disconnect any external monitors or other devices and place the USB drive in a USB 2.0 port of your ThinkPad X220. You will get a response like this: Erasing Disk: 0%. Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app -nointeraction Format your blank USB (8GB is a good size) as Apple OS X Extended (Journaled) using Disk Utility and call it ‘Untitled’.(Download from App store but make a copy of it before you install it as the Apple Installer deletes it after you use it.) Download and keep a copy of the ‘Install OS X El Capitan’ App.If you want a way that is slightly longer but easier for beginners download and run Diskmaker which does the steps below for you automatically! How to make a bootable El Capitan Installer. It is the quickest way but it uses the terminal so it is for advanced users. Here’s how to make a bootable installer of El Capitan on a USB Thumbdrive.
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