Creating a bootable Mac OS X El Capitan USB Image28 Sep 2015
Steps to create a bootable image of Mac OS X El Capitan
- Download El Capitan from the App Store. Never trust downloading it from any other resource.
- While downloading, prepare a USB drive, not less than 8 GB, and format it with Mac OS X (Journaled) file system.
- Open Terminal app from your Applications folder under Utilities.
Once the download is complete, El Capitan installer will auto start, quit it then type the following command in your Terminal app. Please note that the below command assumes you kept the Install OS X El Capitan installer in the Applications folder and your formatted USB is titled as “Untitled”.
sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app --nointeraction
- This will ask you for your admin password, once typed, it will start preparing the media and this should take from 20 to 30 minutes. You will know it is done once it says “Copy Complete. Done.”