Are you trying to make a bootable installer? Do you have the El Capitan installer downloaded from the App Store? You cannot make a bootable DVD but you can make a bootable flash drive.

1. Boot Disk Cd-rom
2. Create El Capitan Boot Disk
3. Make El Capitan Boot Disk
4. How To Create An El Capitan Boot Disk

• Redownloading El Capitan from the App Store (if something was wrong with the first image) - Tried creating the USB on three different Macs (with Mavericks, Yosemite and El Capitan) - Tried creating the USB by using Diskmaker X 5.0.1 instead of the terminal command (on three Macs) - Formatting the USB a thousand times (GUID / OS X - journaled).
• All you need is an 8 GB USB drive and a computer running OS X. Instructions on how to create such an installer are here: How to make a bootable OS X 10.11 El Capitan installer drive Making the installer drive.

Jul 11, 2021 To create a bootable El Capitan installer drive, you need the El Capitan installer from the Mac App Store and a Mac-formatted drive that’s big enough to hold the installer and all its data.Select OS X El Capitan installer on the USB flash drive and then press Return to start up the Mac from the installer. I know of two ways: 1. Run the OS X 10.11 installer. This works even if you already have OS X 10.11 installed. It will automatically create the recovery partition without affecting your currently installed copy of OS X. Ralix Windows Emergency Boot Disk - For Windows 98, 2000, XP, Vista, 7, 10 PC Repair DVD All in One Tool (Latest Version). Bootable USB Stick - macOS X El Capitan.

Bootable USB Installers for OS X Mavericks, Yosemite, El Capitan, and Sierra

Boot Disk Cd-rom

First, review this introductory article: Create a bootable installer for macOS. Second, see this How To outline for creating a bootable El Capitan installer. Simply replace the Terminal command with the one from the preceding article by copying it into the Terminal window. You will need an 8GB or larger USB flash drive that has been partitioned and formatted for use with OS X.

Drive Partition and Format

1. Open Disk Utility in the Utilities' folder.
2. After Disk Utility loads select the drive (out-dented entry with the mfg.'s ID and size) from the side list.
3. Click on the Erase tab in the Disk Utility toolbar. Name the drive, 'MyVolume'. <---- IMPORTANT!
4. In the drop down panel set the partition scheme to GUID. Set the Format type to Mac OS Extended (Journaled.)
5. Click on the Apply button and wait for the Done button to activate. When it does click on it.
6. Quit Disk Utility.

Create Installer

Open the Terminal in the Utilities' folder. Choose the appropriate command line (in red) depending upon what OS X installer you want. Paste that entire command line from below at the Terminal's prompt:

Command for macOS High Sierra:

sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install macOS High Sierra.app

Command for macOS Sierra:

sudo /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install macOS Sierra.app

Command for El Capitan:

sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X El Capitan.app

Command for Yosemite:

sudo /Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X Yosemite.app

Command for Mavericks:

Create El Capitan Boot Disk

sudo /Applications/Install OS X Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X Mavericks.app

Make El Capitan Boot Disk

Press RETURN. You will be asked for your admin password. It will not echo to the Terminal window. Then press RETURN again. Wait for the return of the Terminal prompt signifying the process has completed. It takes quite some time to finish. Be patient.

How To Create An El Capitan Boot Disk

Mar 3, 2018 7:47 PM