Spectre and Meltdown Official Patches
For Microsoft WindowsProtection from Meltdown (variant 3) vulnerability :
Open Malwarebytes for Windows.
Click on Check for Updates to download the latest package 1.0.3624.
Install the latest Microsoft updates for your specific operating system.
Windows 10 - January 3, 2018 - KB4056892 (OS Build 16299.192)
Windows 7, KB4056897
Windows 8.1 KB4056898
For Apple devices
Protection from Meltdown (variant 3) vulnerability :
For macOS devices - upgrade to the latest version macOS 10.13.2
For iOS devices - upgrade to the latest version iOS 11.2.1
Visit the apple website https://support.apple.com/en-us/HT208394 for more information