Official security updates for El Capitan ended in . While still highly functional for legacy software (like older versions of Xcode), it no longer receives modern web browser updates or security patches from Apple.
OS X El Capitan 10.11.6 (Build 15G31) was the final major maintenance release for the El Capitan operating system, released in July 2016. It serves as a critical bridge for older Intel-based Macs that cannot run more modern macOS versions.
: Introduced to the Mac with El Capitan, this API provides near-direct access to the GPU, significantly boosting performance in professional apps and games. Mac OS X El Capitan 10.11.6 Build 15G31 Intel USB 2017
: Apple reported that app launching is up to 40% faster and opening PDFs in Preview is four times faster compared to Yosemite.
Because El Capitan is often used to revive older hardware, creating a bootable USB installer is a common "feature" of this specific version. Official security updates for El Capitan ended in
: Users can create a bootable drive using the createinstallmedia command in the Terminal.
: Build 15G31 addressed issues with NetBoot images and improved startup times when connecting to NetBoot servers. It serves as a critical bridge for older
: This build included a fix for an issue that prevented settings from being saved in accounts with parental controls enabled. USB Installation & Recovery