How To Install Norton Device Security On Mac OS X 10.10.X (Yosemite) To OS X 10.12.X (Sierra)
Click Agree & Install.
In some cases, your Norton product provides you an alert to join the Norton Community Watch that collects information about potential security risks from your computer and sends the information to Symantec for analysis. Do any one of the following:
Click Join Now to enable the Norton Community Watch on your Norton product.
Click Maybe Later to join the Norton Or Reinstall Norton Community Watch later.
You can click Learn More to know more about Norton Community Watch.
When prompted, type your administrator account password, and then click Install Helper.
When the installation completes, click Restart. Your product installation completes after you restart your Mac.