Apple has released macOS High Sierra 10.13.2 Supplemental Update, along with Safari 11.0.2 for Mac OS X El Capitan 10.11.6 and macOS Sierra 10.12.6.
The software updates for Mac aim to help mitigate Meltdown and Spectre security vulnerabilities and are therefore recommended for all eligible Mac users to install.
The Mac security software updates come alongside the download of iOS 11.2.2 update for iPhone and iPad, which includes similar security improvements for those devices and are also recommended to install where applicable.
How to Download & Install MacOS 10.13.2 Supplemental Update and/or Safari 11.0.2 for Mac
Always back up a Mac before installing any system software update.
- Go to the Apple menu and choose “App Store”
- Go tot he “Updates” tab and wait for the page to refresh, otherwise refresh it manually
- For macOS High Sierra users, download and install “macOS High Sierra 10.13.2 Supplemental Update”
- For macOS Sierra and Mac OS X El Capitan users, download and install “Safari 11.0.2”, and if you haven’t done so yet, install any other ‘Security Update’ releases if available
Installing the High Sierra Supplemental Update requires a reboot of the Mac, as do Security Update installations, whereas simply installing Safari 11.0.2 does not require a reboot.
Mac users who prefer to download independent installers can also choose to do so by getting separate DMG installer files directly from Apple at the Mac section of the Support downloads page on Apple.com.
It appears that installing the Supplemental Update in High Sierra will also update the version of Safari to 11.0.2 as part of that patch.
Security Release Notes for macOS High Sierra 10.13.2 Supplemental Update
Available for: macOS High Sierra 10.13.2
Description: macOS High Sierra 10.13.2 Supplemental Update includes security improvements to Safari and WebKit to mitigate the effects of Spectre (CVE-2017-5753 and CVE-2017-5715).
Security Release Notes for Safari 11.0.2 for El Capitan and Sierra
Available for: OS X El Capitan 10.11.6 and macOS Sierra 10.12.6
Description: Safari 11.0.2 includes security improvements to mitigate the effects of Spectre (CVE-2017-5753 and CVE-2017-5715).
Separately, iPhone and iPad users will find iOS 11.2.2 available with security fixes as well.
While these updates may help to mitigate attacks from Spectre and Meltdown via the Safari web browser, if you use other browsers on your Mac (like Chrome and Firefox) you will want to be sure to update them separately for their latest security patches.