I am running Norton 360 9.1.0 with Mac OS Big Sur 12.5.1 on an Intel Mac Mini (2018). Since MacOS 12.5 this Mac mini drags and hangs up repeatedly after waking up from sleep. Using Activity Monitor, I notice that process com.symantec.mes.systemextension is using anywhere from 50-140% CPU. I followed the Norton 360 web site instructions to completely uninstall Norton 360, including a command script to delete hard drive files. After restarting I reinstalled Norton 360 to its current 9.1.0 version. This didn't resolve the com.symantec.mes.systemextension process CPU usage.
Any suggestions? thanks!