Released in 2015, OS X El Capitan (version 10.11) was designed to refine the overhaul introduced by Yosemite. The final update, , released in July 2016, represents the end-of-life cycle for this OS. It was the last version to include:
This is a gray area. macOS is free software, but Apple retains copyright. You are legally allowed to download and install macOS on Apple-branded hardware. However, hosting a pre-made ISO is technically a redistribution of copyrighted code. Mac Os X El Capitan 10.11 6 Iso Download