These advanced steps are primarily for system administrators and people who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install it on multiple computers without having to download the installer each time.

Launch Terminal, located in /Applications/Utilities/. In the Terminal window, enter the following command: sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/elcapitaninstaller -applicationpath /Applications/Install OS X El Capitan.app -nointeraction. OS X El Capitan installer. Hook, El Capitan Garfio (DVDRip-Spanish)(1991 Steven Spielberg). OS X 10.11 El Capitan Bootable USB for Intel PCs. Connect your USB thumb drive to your Mac, then launch the DiskMaker X application from your Applications folder. 3.) A small window will appear asking you to choose from three versions of OS X, in order to create the boot disk. Click the button that says “El Capitan (10.11)”.

What you need to create a bootable installer

• A USB flash drive or other secondary volume, formatted as Mac OS Extended, with at least 12 GB of available storage
• A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra or El Capitan

Download: OS X El Capitan This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. El Capitan Bootable Installer (El Capitan DMG) Now that you have the El Capitan “.app” file, you can use it to update OS X on multiple Macs. If you’re looking for a fresh installation, you need to create the bootable installer for El Capitan. One way to do so is from the El Capitan DMG (InstallESD.dmg) file.

Download macOS

Create Bootable El Capitan Installer

• Download: macOS Big Sur, macOS Catalina, macOS Mojave or macOS High Sierra
  These will be downloaded to your Applications folder as an app called Install macOS [version name]. If the installer opens after download, quit it without continuing the installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. For enterprise administrators, please download from Apple, not a locally hosted software update server.
• Download: OS X El Capitan
  This will be downloaded as a disk image called InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, which has the name InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.

Use the 'createinstallmedia' command in Terminal

1. Connect the USB flash drive or other volume that you're using for the bootable installer.
2. Open Terminal, which is in the Utilities folder of your Applications folder.
3. Type or paste one of the following commands in Terminal. These assume that the installer is in your Applications folder and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume in these commands with the name of your volume.

Big Sur:*

Catalina:*

Mojave:*

High Sierra:*

El Capitan:

* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument and installer path, similar to the way this was done in the command for El Capitan.

How To Make Bootable El Capitan Installer

After typing the command:

1. Press Return to enter the command.
2. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
3. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal displays the progress as the volume is being erased.
4. After the volume has been erased, you may see an alert stating that Terminal would like to access files on a removable volume. Click OK to allow the copy to proceed.
5. When Terminal says it's finished, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur. You can now quit Terminal and eject the volume.
   

Use the bootable installer

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

Apple silicon

Make Bootable El Capitan Installer

1. Plug the bootable installer into a Mac that is connected to the Internet and compatible with the version of macOS you're installing.
2. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes and a gear icon labelled Options.
3. Select the volume containing the bootable installer, then click Continue.
4. When the macOS installer opens, follow the onscreen instructions.

Create El Capitan Install Media

Intel processor

Bootable Macos Installer El Capitan

1. Plug the bootable installer into a Mac that is connected to the Internet and compatible with the version of macOS you're installing.
2. Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
3. Release the Option key when you see a dark screen displaying your bootable volumes.
4. Select the volume containing the bootable installer. Then click the up arrow or press Return.
   If you can't start up from the bootable installer, make sure the External Boot setting in Startup Security Utility has been set to allow booting from external media.
5. Choose your language, if prompted.
6. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.

Learn more

For more information about the createinstallmedia command and the arguments that you can use with it, make sure the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:

Boot.efi El Capitan Download

• Big Sur: /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia
• Catalina: /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia
• Mojave: /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia
• High Sierra: /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia
• El Capitan: /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia

Install El Capitan Dmg

How To Make A Bootable El Capitan Installer

A bootable installer doesn't download macOS from the Internet, but it does require an Internet connection to get firmware and other information specific to the Mac model.

This is Ultimate tutorial for installing Mac OSX up to EL Capitan 10.11.
You don't need working mac installation or AHCI capable motherboard, it can be done on any PC.
Tools that you need:
OSF Mount - http://www.osforensics.com/tools/mount-disk-images.html - This is most important tool, it can mount efi partition on image and edit it.
image link: https://goo.gl/nMcpOG
win 32 disk imager - http://win32-disk-imager.en.uptodown.com/ - this will be used to write image to USB, you can also use other software, there are many of them, i use this one.
In case you did not listen to me and you want to do this harder way:
http://www.hackintosh.zone/file/828-bootdiskutility-v212015/ - utility that can install clover from windows.
https://sourceforge.net/projects/cloverefiboot/files/Installer/ - Clover installer package
The most important note!!! ---- You need Sata kext in 10.11 folder, that will make your HDD to show up in disk manager, without it you will get still waiting for root device and your HDD wont show up in disk utility and you wont be able to install EL Capitan on your HDD.
My Specs :
Processor - e7200 core2duo
Ram - 6gb - different modules with different speed and latency
HDD - 320+720gb - sata2
USB - 16gb Kingstone
GPU - HD 7850 2gb dual bios.
Motherboard - P5N-D - https://www.asus.com/Motherboards/P5ND/