Apple Releases macOS High Sierra 10.13.4 Beta [Download]

Kelley Robertson
January 25, 2018

Apple first patched the Meltdown flaw (CVE-2017-5753) on December 6, 2017, with the release of iOS 11.2, macOS 10.13.2, and tvOS 11.2.

Yesterday, Apple's security team released supplemental security updates for older macOS versions -macOS Sierra 10.12.6 and OS X El Capitan 10.11.6.

This patch is for Sierra and El Capitan, the previous two incarnations of macOS (versions 10.12 and 10.11 respectively). The 10.13.3 update has also been released for minor fixes. Patches to operating systems are one of the key ways to protect computers.

This latest High Sierra update says it includes security and stability updates, while it also "Addresses an issue that could cause Messages conversations to temporarily be listed out of order".


Back at the start of January, Apple said it had already protected users against Meltdown in macOS High Sierra.

As soon as the Spectre and Meltdown CPU bugs became public knowledge, OS makers began kicking patch development into overdrive in an effort to plug the security holes as quickly as possible. If your Mac is enrolled, the message "Your computer is set to receive beta software update" is shown ● Install the macOS Developer Beta After completing enrollment, install the developer beta from Updates in the Mac App Store. Alternatively, it can also be updated through iTunes.

Because the exploits take advantage of design decisions meant to make CPUs faster, it's worth noting that introducing fixes for Meltdown and could slow down a computer. In order to fight this, operating systems need to be patched to block access, which can have an impact on performance in some circumstances, but for regular consumers, it shouldn't affect much.

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