Mac Os X El Capitan 10.11 6 Iso Download [better] -

Historically, Apple made it possible to download older versions of macOS directly, but now they encourage users to upgrade to the latest version.

Apple provides the OS X El Capitan installer as a disk image (.dmg) file. Once downloaded, opening the .dmg file reveals a .pkg installer that places the "Install OS X El Capitan" app into your Applications folder. Mac Os X El Capitan 10.11 6 Iso Download

You now have a pristine, safe ISO.