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There's also a second method, and it's the method we prefer because it's less involved, has fewer 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.
MAC OS ISO TO USB HOW TO
If you wish to use this method, you can follow our guide on how to make a bootable copy USB flash drive of the OS X Yosemite Installer, and no, that's not a typo. 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. Of 02 Create a Bootable OS X El Capitan Installer on a USB Flash Drive 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. But even if this is your goal, it's not too likely that you're actually ready to start the install process. 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.
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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, released during the Summer of 2015 and was available from the Mac App Store as a free download.
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MAC OS ISO TO USB MAC OS
The USB flash drive from MBR to GPT format, you can use the steps below to create a bootable USB installation media to install Mac OS X. How to make a bootable OS X 10.11 El Capitan installer drive A bootable installer drive is much more convenient when you're upgrading a Mac.