What You Needįirst, you’ll need a copy of the OS X El Capitan installer, which is available from the Mac App Store. There’s also a second method, and it’s the method I prefer, because it’s less involved, has few places where things can go wrong, and only involves using a single app: Terminal. The older process outlined in the Yosemite document will work for El Capitan you need only be aware of file name changes, such as El Capitan instead of Yosemite in the instructions. If you wish to use this method, you can follow the guide How to Make a Bootable Copy USB Flash Drive of the OS X Yosemite Installer, and no, that’s not a typo. How to Create the Bootable Installer for OS X El Capitan There are two methods of creating the bootable installer one involves using Disk Utility, the Finder, hidden files, and a great deal of effort and time. But having your own copy of El Capitan on a separate device ensures that you’ll always be able to install or reinstall it, or perform basic Mac troubleshooting tasks, even if you have no connection to the Internet or access to the Mac App Store, should you need to re-download El Capitan. Having a bootable installer for OS X El Capitan is a good idea, even if your plan is just to perform an upgrade install, which technically doesn’t need to be done from a separate boot device. After all, there’s quite a bit of housekeeping to be done before you commit to installing OS X El Capitan: that includes having a recent backup of your data, and making a bootable OS X El Capitan installer on a USB flash drive. This would be fine if all you wanted to do was quickly install El Capitan as an upgrade install over your existing version of OS X.īut even if this is your goal, it’s not too likely that you’re actually ready to start the install process. Like previous versions of OS X, El Capitan has the annoying habit of automatically starting the installation process once the download is complete. OS X El Capitan, the latest version of OS X as of the summer of 2015, is available from the Mac App Store as a free download. Create a Bootable OS X El Capitan Installer on a USB Flash Drive an article by Tom Nelson
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