CUPERTINO, CA--(Marketwire - December 10, 2007) - Symantec Corp. (NASDAQ:
SYMC) today announced the new Mac OS X 10.5 Leopard compatible version of
Norton AntiVirus 11 for Mac:

-- Features new vulnerability protection technology, delivering protection
where the majority of today's attacks occur -- at the Web application layer

-- Automatically detects and removes viruses, scans and cleans downloaded
files and e-mail attachments, and protects against software vulnerabilities

-- Detects and removes viruses and worms, prevents virus infected e-mail
from spreading and protects against attacks

-- To address the growth of multi-platform PC and Mac environments, Norton
AntiVirus 11 for Mac scans for both PC and Mac vulnerabilities, viruses and
macro viruses

-- Includes performance and engine improvements to ensure better
compatibility and less impact on system startup and resource usage.
Product, virus definition, and vulnerability protection updates are
automatic

-- A new Norton AntiVirus dashboard widget gives a quick summary of system
protection and status. Features a "snooze button" scan, if you are in the
middle of watching a movie on the computer, the virus scan can be
rescheduled for a more convenient time

-- Norton AntiVirus 11 for Mac features can be accessed via the Terminal,
allowing power users to bypass the application completely and add antivirus
scans and other capabilities to their own custom scripts.

-- Norton Confidential for Macintosh, also compatible with Mac OS X
Leopard, works with other security solutions like Norton AntiVirus 11 for
Mac to keep you safe while shopping, banking or conducting other
transactions on the Internet.

Rowan Trollope, senior vice president, Consumer Business Unit, Symantec
Corp. "This Leopard-ready version of Norton AntiVirus 11 for Mac gives
users peace-of-mind by protecting against vulnerabilities and blocking
viruses and other malicious code."

Rowan Trollope, senior vice president, Consumer Business Unit, Symantec
Corp. "Mac users need security because no operating system is immune to
threats. Mac users can also receive and pass on threats -- like Macro
viruses -- to users of other PCs."

Norman R. Nager, Ph.D., Norton AntiVirus 11 for Mac beta tester and
Symantec customer. "Norton AntiVirus 11 for Mac has proved to be
well-designed, very effective and exceptionally fast with Tiger 10.4.x and
Leopard 10.5.x It affords an excellent shield of protection for my
computer."

Norman R. Nager, Ph.D., Norton AntiVirus 11 for Mac beta tester and
Symantec customer. "I bought Norton AntiVirus for Mac because I have
family, friends, alumni and colleagues who use the Windows operating system
or Virtual PC, and I wanted to stop cold on my Mac any viruses, worms, and
Trojan horses that could infect their computers."

About Symantec

Symantec is a global leader in infrastructure software, enabling businesses
and consumers to have confidence in a connected world. The company helps
customers protect their infrastructure, information and interactions by
delivering software and services that address risks to security,
availability, compliance and performance. Headquartered in Cupertino,
Calif., Symantec has operations in more than 40 countries. More information
is available at (http://www.symantec.com).