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If you install a client version earlier than 14.2 RU1 (refresh) on macOS 10.14.5, or upgrade the operating system to macOS 10.14.5 with an earlier version of Symantec Endpoint Protection already installed, you may experience issues. Kext notarization was added in macOS 10.14.5.See About authorizing kernel extensions for Symantec Endpoint Protection for macOS 10.13. However, if you reinstall the operating system, you need to reauthorize the kernel extension. If you have Symantec Endpoint Protection 14 and then upgrade to macOS 10.13, you don't need to reauthorize the kernel extension. If you uninstall and reinstall the client, you don't need to reauthorize the kernel extension. You only need to authorize the kernel extension once during the life of the computer's operating system. Neither Symantec Endpoint Protection nor the Mac operating system continue to remind you that you must do this.
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If you do not do it during the client installation, go to System Preferences > Security & Privacy, and click Allow. You are prompted during the client installation to do it if needed. As of macOS 10.13, you must authorize the Symantec Endpoint Protection kernel extension after installation for Symantec Endpoint Protection to fully function.Mac clients for Symantec Endpoint Protection Cloud do not support Mac OS X 10.11 (El Capitan).See Remove Symantec software for Mac using RemoveSymantecMacFiles. Remove legacy Symantec AntiVirus (SAV) for Mac installations before installing Symantec Endpoint Protection.As of version 12.1.2, case-sensitive formatted volumes are supported.PowerPC processors are not supported as of version 12.1.x.The Symantec Endpoint Protection client for Mac is managed by a Symantec Endpoint Protection Manager (SEPM) on a Windows server.
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