I installed Norton Lifelock On my iMac which has created performance problems including frequent shutdowns requiring restarts. I am running High Sierra. IMac is 6 years old but otherwise works great. I have uninstalled and then reinstalled Norton 3 times with the same poor result. Did I make a mistake with Norton? Is there something else on the iMac likely interfering with Norton?
iMac 21.5", macOS 10.13
Apple has multiple levels of built-in security in the operating system that are compromised by adding third-party anti-virus, and other total control software whose only claim to fame is operating system, and application disruption.
I would uninstall Norton and leave it uninstalled. Security apps are not needed on a Mac and as you found out, cause problems.
Norton is one of the worst things you can install. It has a long and sordid history of crippling Macs.
I cringe every time I see a Norton/Life Lock commercial... I have no idea why there isn't an overwhelming clamor.
Norton Lifelock and High Sierra
