What's new in the 10.6.1 release This release of McAfee® Endpoint Security for Mac addresses issues called out in the Resolved Issues section. Important: You must install McAfee® Endpoint Security ePO extension update 10.6.1 or later to use this product. For more information about the ePO extension update build numbers, see McAfee Endpoint Security 10.6.1 ePO Extension Update Build 1146 Release Notes. When you upgrade Threat Prevention on standalone systems, irrespective of the mode you are using currently, Threat Prevention is upgraded to Kext mode. You can change it to KextLess mode after the upgrade using commands. For managed systems, you can upgrade Threat Prevention from KextLess mode to KextLess mode, using the command line argument KextLess in the deployment task. If you don't include the KextLess argument, Threat Prevention is upgraded to Kext mode. For more information about using commands, see Endpoint Security for Mac 10.6.0 installation guide.