New macOS patch protects older operating systems against Meltdown

Apple has rolled out a new security update to protect older operating systems against the Meltdown bug, the most easily exploitable of the processor vulnerabilities made public earlier this year. Patches for macOS High Sierra were released on January 8th, but the patch did not apply to older versions of the operating system. Today’s update brings the same protections to Sierra (version 10.12.6) and El Capitan (version 10.11.6).