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EDITOR NOTES
The 'Download Now' link is for the Intel version, for PPC Macs download here.
DESCRIPTION
Norton AntiVirus Defs are the latest anti-virus detection files. The installer will automatically update Norton AntiVirus 11 virus definitions and engine files to detect and repair the most recently discovered Macintosh viruses. This file is a self-extracting archive which contains the Norton AntiVirus Virus Definitions Installer. Once downloaded and expanded on your hard drive, simply double-click on the Installer and the appropriate files will be installed on your computer.
WHAT'S NEW
Release notes were unavailable at the time this listing was updated.
REQUIREMENTS
One of the following: - Norton AntiVirus 11.x
- Norton AntiVirus 10.2

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| Norton AntiVirus Definitions User Reviews (63 posts) | Write A Review |
 | Jun 23 2009 |
WIZARD2 NAV is pure [expensive] garbage. Have you ever tried to remove this crap from a machine? It spews hundreds of bits throughout your drive with obscure names totally unrelated to NAV. Even AppZapper missed a few 'bits' during UNinstall. Know what happened? It GREW BACK. Like Hydra. It gew more tentacles to drawe you back into the paying fold of dweebs. NAV IS A VIRUS. It takes over your machine, re-imposes itself if you don;t remove every single remaining piece, and then, if you opt out of their 'subscriptions', it takes over your CPU while it nags you. Get ClamXAV instead www.clamav.org Better, faster, cheaper [free] (Version 6/22/09) | |
| [ 10 Replies - Reply ] | |
Replies:
 | Jun 30 2009 |
SOLOSAINT just use the uninstaller to remove... most anti-virus software requires its uninstaller to remove itself due to the nature of maleware trying to remove or disable the AV software (Version 6/30/09) | |
 | Jul 3 2009 |
STUDIODAVE56 The only true virus on the Mac is any virus protection software, "YOU DON'T NEED THIS" (Version 7/02/09) | |
 | Jul 3 2009 |
SOLOSAINT unless, of course, you get a virus .... (Version 7/02/09) | |
 | Jul 3 2009 |
STUDIODAVE56 If someone actually figured out how to write a real virus for the Mac, none of the virus protection software would know how to stop it. So until there is a virus proven to be released in the wild and infecting Mac computers you are wasting your time, money and computer cycles. (Version 7/02/09) | |
 | Jul 3 2009 |
SOLOSAINT yeah, that is why Apple recommends Antivirus software on your mac.. http://www.pcpro.co.uk/news/240255/apple-recommends-security-software-for-mac-owners.html ..I love the Mac, but it sure attracts some n00bs ... look, every computer needs some security software, antivirus, anti-worm/trojan, anti malware, IDS, etc ... dont be a n00b (Version 7/02/09) | |
 | Jul 3 2009 |
STUDIODAVE56 The only reason Apple recommends the use of any virus program is because if in fact someone ever figures out how to release one they would be there to try to pick up the pieces a little faster than if they were not even working a Mac program. So prevention from a currently non existent virus would take weeks to fix verses years. If there ever is a virus you will either get it (even if you are running virus protection) or you will have time to buy the software and install it before it gets you. (Version 7/02/09) | |
 | Jul 3 2009 |
STUDIODAVE56 I should also note that Norton would be my last choice. This is listed as free, it is not free it is only available for your yearly subscription fee. (Version 7/02/09) | |
 | Jul 3 2009 |
SOLOSAINT oh goodness n00b... you just said that all these anti-virus softwares for Mac protect against NOTHING and are just in case something does come out, do you really think Apple would recommend software for a hypothetical future situation? Sure people, if you believe this n00b, then don't protect your Mac. Oh, and if you are smart and want to check out what AV programs protect against, just check the virus definition files on Symantec's website or in the program itself. There have been Mac viruses since OS 7, remember the program Disinfect? Dam n00bs make Mac users look like idiots (Version 7/02/09) | |
 | Jul 3 2009 |
STUDIODAVE56 Your true lack of knowledge is showing. You know nothing about politics. There has not been a virus for the Mac since OS9. I have been using Mac since OS6. Never seen a Mac virus and surfed the web every day. Worked at a mostly PC company for 7 years and continued to work while the rest of the company went down because I was doing my email on the Mac. 6 years later they are all Mac. I would get email with virus attachments all the time and that is when everyone else went down, not me. What ever that "n00b" means it must be your tiny brain a bit glitchy because real men don't talk like that. That's all for you, go waste your time and money on all the useless virus "Non"Protection software there is. I'm not wasting any more time with you. (Version 7/02/09) | |
 | Jul 3 2009 |
SOLOSAINT hahahhaha, you wrote whatever n00b means... thats funny.. well, Symantec is a multi million dollar company, why dont you just prove to them that isnt a mac virus and thus they are falsely advertising... your example of your mac not getting a PC virus is retarded, of course it wouldnt have been infected, PC viruses dont do anything on a mac, its different code that cannot run on the mac platform. hope you one day get a sense of how computers work... but yeah, let macupdate users read our convo and maybe some will decide that the dozen AV Mac progies are all bogus, all of them, sure... n00b (Version 7/02/09) | |
 | Jun 23 2009 |
KUPHD Can anyone tell me why in the world anyone uses this useless, overpriced piece of garbage anymore? Get ClamX. It's free. (Version 6/22/09) | |
| [ Reply ] | |
 | May 16 2008 |
SOLOSAINT it finds windows viruses ... it found wimad the other day ... good to know had I given that mp3 to someone with a PC... (Version 05/16/08) | |
| [ 2 Replies - Reply ] | |
Replies:
 | Sep 21 2008 |
LOKHEED All Windows systems have an AV. If you passed along a virus, the AV installed on the person's PC would have found it... Running an AV on Mac OS X to protect PCs is absurd (and no doubt nets Symantec a nice profit). The equivalent of someone who buys car insurance and then opts to take the bus... It seems the age old maxim: "a fool and his money are soon departed" still hold true. (Version 09/18/08) | |
 | Feb 26 2009 |
SOLOSAINT "All Windows systems have an AV" ... um, go back to A+ certification school, All Windows systems DO NOT have an AV, tard (Version 2/20/09) | |
 | Nov 13 2007 |
SOLOSAINT yes, there are mac Mac maleware, you sound like a noob when you say there are NONE but it is true that there are not a whole lot out there for Mac, unlike there are for windows. and did someone say the scanned a system with viruses on it for windows? this doesnt find Windows Virri... only Mac ones. if you would like to have something scan for all OS's, upload it to yahoo or gmail email, let them scan it... (Version 11/08/07) | |
| [ 3 Replies - Reply ] | |
Replies:
 | Feb 21 2008 |
TWELVEIGHTYONE Could you please provide evidence of the malware that affects OS X? (Version 02/20/08) | |
 | Feb 21 2008 |
TRONDAH I'd like to see that too. As a system administrator for an IT company through 6 years I have yet to see any. I know it's possible, and that there are proof of concepts floating around, but in practice I never even heard of anyone getting infected by anything. (Version 02/20/08) | |
 | Feb 21 2008 |
PETER DA SILVA There have been two cases of malware for OS X that could have been considered to be "in the wild". One was distributed by AIM file transfers, and the recipient had to explicitly save and run the program, and one was disguised as a special codec to allow the victim to view images at a porn site... and again the victim had to explicitly install it. Neither lasted long enough for antivirus software to have a detection pattern added quickly enough to have made the inherent dangers of running antivirus software worthwhile. (Version 02/20/08) | |
 | Oct 7 2007 |
Won't find any viruses at all. I've tested this on a windows partition where i know this ones infectet with tons of viruses, trojans & co. NAV hasen't found any virus while clamXav has found about 300 threads. (Version 10/02/07) | |
| [ Reply ] | |
 | Aug 10 2007 |
STUDIODAVE56 So you buy this install it and why? There is nothing to protect against. There are no Mac viruses. (Version 08/09/07) | |
| [ Reply ] | |
 | Apr 26 2007 |
WIZARD2 NAV is worse than a virus. Why? Have you ever tried to get rid of NAV? I mean ALL if it... the bazillions of files it injects _everywhere_. You know the ones that self-replicate -- like the viruses it is supposed to guard against. ClamAV is FREE, the definitions are updated DAILY, and it does not exhibit the same infectious behavior shown by NAV. Guess I really shouldn't complain, as a system admin I have been paid LOTS of money for the hideous amounts of time it takes to rid a computer of this pest. (Version 4/25/07) | |
| [ Reply ] | |
 | Jul 13 2006 |
RAY16 Hey Me! you're out there all alone...........lol, must have been you Drive or the install messing up, or the firewall, can ya hear me............ I first installed NSW 3.0 when I had the last build of 10.2.8, now I have 10.3.9. I've used the older NSW since the old OS 8.6 days. When the virus are updated, why does the first scan take soooooooo long sometimes up 20hrs. Any scan after that takes maybe 20-30mins. Now I know I'm not the only one who thinks about this! Can Norton's provide a download to fix this? I do plan to put in a 1ghz processor, would that help? any answers!!! I have a G3 B&W (Version 7/12/06) | |
| [ Reply ] | |
 | May 19 2006 |
MICKY1 http://www.macupdate.com/info.php/id/15850 (Version 5/18/06) | |
| [ 1 Reply - Reply ] | |
Replies:
 | Jul 13 2006 |
D9 ClamXAV seems pretty sweet and simple to setup. I guess the proof is in the pudding to see if it both catches potential viruses as well as avoids cramping the system in doing so. Any info on whether this scans for PC viruses, too? This is important for those of us working in mixed environments where are Macs at the least may be transporters for those bugs. (Version 7/12/06) | |
 | Nov 3 2005 |
ANONYMOUS Does anybody comment on NAV that doesn't hate it for whatever reason? As a U.S. Department of Defense member, I have access to the DOD agency licensed (regular corporate) level product, which is free for anyone connected with the DOD, even contractors. I run NAV9 on my three personal Macs at home (OSX 10.4.2 and 10.4.3 until I get them all updated) and have for years. We also run them on all our Macs at work. In all cases, we do it not only because DOD policy madates using AV software (and provides your choice of several products), but because it's only polite to the poor Windows users we all interface with so we aren't virus vectors to them. I've never had a problem with NAV loading, setting up properly, or running as expected--on any of many systems from OSX 10.1x onward. If there's a problem with the personal edition, Norton needs to fix that. But it is NOT a universal problem, and may also be an issue with a misconfiguration on a particular Mac or due to not verifying and repairing permissions often enough, too. (Version 11/02/05) | |
| [ 2 Replies - Reply ] | |
Replies:
 | Jun 9 2006 |
MECHAMANIA If Windows users need the protection, then they can buy me the software and install and maintain it. Better yet, they can get a Mac. (Version 6/8/06) | |
 | Sep 20 2008 |
BUBI I don't see the point. if the dod thinks you need an antivirus for a mac then god save america!!!! Had a mac since 1994 and yet to see one!! what a joke! (Version 09/18/08) | |
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