Double click on El Capitan.DMG to mount it, then borrow the El Capitan.app.
Run, DiskMaker X, then *choose El Capitan (10.11).
How make Windows El Capitan bootable USB? The El Capitan installer is downloaded to the /Applications folder, with the file name “Install OS X El Capitan.” If you already installed El Capitan and now want to create a bootable installer, re-download the installer from Apple.
Once complete, exit from Disk Utility and return the main menu.
When the menu finally turns up, choose Disk Utility and format the SSD as Mac OS Extended (Journaled) with a unique name.
Insert the El Capitan USB stick into the target laptop and power up.