The update also fixes issues like a maliciously crafted audio file leading to arbitrary code execution and one where an application could run arbitrary code using kernel privileges. While the update has modifications on several fronts such as audio, kernel, WebKit, and Wi-Fi, the most noticeable feature is the security patch against the Meltdown bug. The macOS High Sierra 10.13.3 update has also been released for minor fixes.Īvailable on macOS High Sierra version 10.13.2, the security patch has now been rolled out to older macOS versions, macOS Sierra 10.12.6 and OS X El Capitan 10.11.6. The updates are dubbed Security Update 2018-001. These updates include patches for the Meltdown bug that emerged earlier this month. After releasing the macOS High Sierra 10.13.2 Supplemental Update in early January, Apple has on Tuesday released security updates for its older macOS versions - macOS Sierra and OS X El Capitan. The first week of 2018 saw global security flaws such as Meltdown and Spectre plaguing mobile and desktop CPUs.

X el capitan vs sierra