Are you installing this on an or a virtual machine ?
By following the official and DIY methods described above, you can safely obtain a clean, bootable version of OS X El Capitan 10.11.6. Good luck! mac os x el capitan 10.11 6 iso download 720p
OS X 10.11.6 focuses heavily on system performance, security patches, and stability, refining the visual overhaul introduced in Yosemite. System Requirements Are you installing this on an or a virtual machine
What you are using to build the installer (Windows or macOS?) you can safely obtain a clean