leslie terry Said:
"Antivirus Protection: [...] I installed Norton 360 and it caused huge problems with the energy and CPU."
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Take this as a Learning Experience:
Keep Security Software off of your Mac:
As for Uninstalling Norton 360:
Go Here: Remove all Norton Programs for Mac using the RemoveNortonMacFiles Tool - Norton Support. Running that application keeps everything off of your Mac - shortcuts even. Using that tool, all would be removed. Though you should keep Norton off of your Mac, if you are having such issues as this CPU usage, then I'd say...
- Reinstall: Norton
- Restart: the Mac
- Uninstall: Norton
- Restart: the Mac
Creating a Time Machine Backup First...
Next time you install such software that affects you Mac in many different ways (i.e. backups, multitasking, and disk cleanup), then backup your Mac first. Malwarebytes Anti-Malware for Mac is fine, thought for reasons I mentioned above. So, create a backup of your Mac, then go about removing the software. Create a Time Machine Backup of your Mac, that way you can have something to restore your Mac from, should anything go wrong with the install, and to migrate it all back. Use an External Hard Drive at least 1.5 times the size of the Internal Hard Drive.