https://techcrunch.com/2018/01/08/apple-releases-ios-and-macos-updates-with-a-mitigation-for-spectre/ >Apple just released iOS 11.2.2 with some Safari and WebKit improvements to mitigate the Spectre vulnerability. macOS is also receiving an update. It’s a supplemental update to macOS High Sierra 10.13.2 and it includes the same fix. >As always, you should update your devices with the latest security patches. In this case, Meltdown and Spectre are serious vulnerabilities. With Meltdown, a malicious application running on an unpatched device can read the unencrypted kernel memory. You don’t want anyone to grab your password and private encryption keys.