NortonLifeLock, the NortonLifeLock Logo, the Checkmark Logo, Norton, LifeLock, and the LockMan Logo are trademarks or registered trademarks of NortonLifeLock Inc. LifeLock identity theft protection is not available in all countries. The Norton and LifeLock Brands are part of NortonLifeLock Inc. Cancel the Norton plan in-app purchase from Apple App Store, Google Play Store, or Microsoft Store.Activate the Norton 360 app on your mobile device.Your installer is not working properly' on Mac Fix problems opening Norton device security for Mac.Message: '.You haven't finished Setup and your computer is not protected.' on Mac.Message: 'You have a newer version of the product already installed.' when installing Norton for Mac.Error: 'An error has occurred' when installing or uninstalling Norton.Download and install Norton 360 app on your mobile device.Error: 'This product is not compatible with this computer's current operating system.' when installing Norton.Activate or renew your NortonLifeLock subscription.