This new security feature in macOS High Sierra requires you to manually approve new applications that require access to the kernel using kernel extensions. This should not affect agents already installed on macOS systems that are then upgraded to macOS High Sierra version 10.13.2 and later.įor instructions on how to determine which version of macOS you are using, see How to check my Cylance Smart Antivirus macOS version. Note: This should only affect new installations of the Cylance Smart Antivirus agent on macOS High Sierra version 10.13.2 and later. Additional steps are now required to install Cylance Smart Antivirus and many other antivirus products on the latest versions of macOS. Starting with the update to macOS High Sierra version 10.13.2, a new security feature requires users to approve new applications that interact with the kernel, a core part of the operating system. Update: macOS Big Sur (11.x) is now supported by Cylance Smart Antivirus version 1580 and later.