DiskMaker X is an application built with AppleScript that you can use with many versions of OS X/macOS to build a bootable drive from OS X/macOS installer program (the one you download from the App Store).
- Create a bootable macOS install disk
- Easy to use
How to Make a Bootable OS X 10.10 Yosemite Installation Drive
How to Download and Perform a Clean Install of OS X El Capitan