Once your bootable USB is configured, you can install the operating system using these steps: Turn off the target Mac completely.
The official DMG has a SHA256SUM of . Always verify downloaded files against this hash to ensure they are authentic.
🔗 http://updates-http.cdn-apple.com/2019/cert/061-41343-20191023-573f85e7-ee16-4bf4-a3e3-bf2f8c1ef0ae/InstallMacOSX.dmg Mac Os X El Capitan 10.11.6 Installer Dmg Download
⚠️ This link works (including older Macs that support El Capitan). On newer macOS versions (Mojave+), it may redirect or fail.
Double-click the downloaded InstallMacOSX.dmg file. Once your bootable USB is configured, you can
Apple occasionally retires old download links. If the link above stops functioning, try these alternatives:
Select the drive named using the arrow keys and press Enter . Once the macOS Utilities screen loads: 🔗 http://updates-http
install the OS yet. It extracts the actual installer app into your Applications Locate the Installer : Go to your Applications folder and find the app named Install OS X El Capitan Apple Support Community System Compatibility
This occurs because the security certificates embedded inside older Apple installers have expired.