With the 2015 series of products, Symantec made changes in its portfolio and briefly discontinued Norton AntiVirus. Version 12 is the only version fully compatible with Mac OS X Lion.

Versions 2010, 2011, and 2012 all natively support Windows 7, without needing an update. Version 2009 has Windows 7 supported update already. Windows 7 support was in development for versions 2006 through 2008. Norton AntiVirus runs on Microsoft Windows, Linux, and macOS. Competitors, in terms of market share in this study, include antivirus products from CA, Trend Micro, and Kaspersky Lab. Norton AntiVirus and Norton Internet Security, a related product, held a 61% US retail market share for security suites as of the first half of 2007. Symantec distributes the product as a download, a box copy, and as OEM software. Other features included in it are e-mail spam filtering and phishing protection. It uses signatures and heuristics to identify viruses. Norton AntiVirus is an anti- virus or anti- malware software product founded by Peter Norton, developed and distributed by Symantec (now Gen Digital) since 1990 as part of its Norton family of computer security products. Microsoft Windows ( Windows 95 and later), macOS, Linux

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