Apple maintains a hidden support page for legacy downloads. Here is the safest way to get the .
If the checksum does not match, the file is either corrupted or tampered with. download mac os el capitan dmg
Mac OS El Capitan, also known as OS X El Capitan, is a major release of Apple's operating system for Mac computers. It was announced on June 8, 2015, and released on September 30, 2015. El Capitan is the 12th major release of the Mac OS X series and is succeeded by macOS Sierra. Apple maintains a hidden support page for legacy downloads
This method is 100% safe and provides the original, unmodified DMG directly from Apple’s servers. and released on September 30
Once you've downloaded the Mac OS El Capitan DMG file, follow these steps to install it: