McAfee, LLC (; formerly known as McAfee Associates, Inc. in 1987-2014 and Intel Security Group in 2014-2017) is an American global computer security software company headquartered in Santa Clara, California and claims to be the world's largest dedicated technology security company.
The company was purchased by Intel in February 2011, and became part of the Intel Security division.
On September 7, 2016, Intel announced a strategic deal with TPG Capital to convert Intel Security into a joint venture between both companies called McAfee. That deal closed on April 3, 2017.Thoma Bravo took a minority stake in the new company, and Intel maintains a 49% stake.
The company restructured in 2004, beginning with the sale of its Magic Solutions business to Remedy, a subsidiary of BMC Software early in the year. In mid-2004, the company sold the Sniffer Technologies business to a venture capital backed firm named Network General (the same name as the original owner of Sniffer Technologies), and changed its name back to McAfee to reflect its focus on security-related technologies.
McAfee, as a result of brief ownership of TIS Labs/NAI Labs/Network Associates Laboratories/McAfee Research, was highly influential in the world of open-source software, as that organization produced portions of the Linux, FreeBSD, and Darwin operating systems, and developed portions of the BIND name server software and SNMP version 3.
McAfee had acquired Calgary, Alberta, Canada-based FSA Corporation, which helped the company diversify its security offerings away from just client-based antivirus software by bringing on board its own network and desktop encryption technologies.
The FSA team also oversaw the creation of a number of other technologies that were leading edge at the time, including firewall, file encryption, and public key infrastructure product lines. While those product lines had their own individual successes including PowerBroker (written by Dean Huxley and Dan Freedman and now sold by BeyondTrust), the growth of antivirus ware always outpaced the growth of the other security product lines. It is fair to say that McAfee remains best known for its anti-virus and anti-spam products.
Acquisition by Intel and spin-off
On August 19, 2010, Intel announced that it would purchase McAfee for $48 a share in a deal valued at $7.68 billion.
On January 6, 2014, Intel CEO Brian Krzanich announced during the Consumer Electronics Show the name change from McAfee Security to Intel Security. The company's red shield logo would remain, with the firm continuing to operate as a wholly owned Intel subsidiary. John McAfee, who no longer has any involvement in the company, expressed his pleasure at his name no longer being associated with the software. "I am now everlastingly grateful to Intel for freeing me from this terrible association with the worst software on the planet. These are not my words, but the words of millions of irate users." However, as of 2016 the products still bore the McAfee name.
The company was spun back out of Intel on April 4, 2017.
On June 9, 1998, Network Associates agreed to acquire Dr Solomon's Group plc, the leading European manufacturer of antivirus software, for $642 million in stock.
On April 2, 2003, McAfee acquired IntruVert Networks for $100 million. According to Network World, "IntruVert's technology focus is on intrusion-prevention, which entails not just detecting attacks, but blocking them. The IntruVert product line can be used as a passive intrusion-detection system, just watching and reporting, or it can be used in the intrusion-prevention mode of blocking a perceived attack."
In August 2004, McAfee agreed to acquire Foundstone, a vendor of security consulting, training, and vulnerability management software, for $86 million.
On April 5, 2006, McAfee bought out SiteAdvisor for a reputed $70 million in competition with Symantec, a service that warns users if downloading software or filling out forms on a site may obtain malware or spam.
On June 6, 2006, McAfee announced that it would acquire Preventsys, a California-based company offering security risk management products. The acquisition cost McAfee under $10 million.
On October 16, 2006, McAfee announced that it would acquire Israel based Onigma Ltd for $20 million. Onigma provides host-based data leakage protection software that prevents intentional and unintentional leakage of sensitive data by internal users.
SafeBoot Holding B.V.
On October 8, 2007, McAfee announced it would acquire SafeBoot Holding B.V. for $350 million. SafeBoot provided mobile data security solutions that protected data, devices, and networks against the risk associated with loss, theft, and unauthorized access. Through the acquisition, McAfee became the only vendor to deliver endpoint, network, web, email and data security, as well as risk and compliance solutions. Gerhard Watzinger, CEO of SafeBoot, joined McAfee to lead the Data Protection product business unit. The deal closed on November 19, 2007.
On October 30, 2007, McAfee announced plans to acquire ScanAlert for $51 million. The acquisition integrated ScanAlert's Hacker Safe service and McAfee's SiteAdvisor rating system to attack website security from both sides. It was the industry's first service to help consumers stay safe as they searched, surfed and shopped. The deal closed on February 7, 2008.
On July 31, 2008, McAfee announced it would acquire Reconnex, a maker of data protection appliances and software. Reconnex sold data loss prevention software, designed to prevent sensitive documents and data from leaving corporate networks. The acquisition added content awareness to McAfee's data security portfolio. The $46 million deal closed on August 12, 2008.
On September 22, 2008, McAfee announced an agreement to acquire Secure Computing, a company specializing in network security hardware, services, and software products. The acquisition expanded McAfee's business in securing networks and cloud computing services to offer a more comprehensive brand of products. The deal closed on November 19, 2008 at a price of $497 million.
In January 2009, McAfee announced plans to acquire Endeavor Security, a privately held maker of IPS/IDS technology. The deal closed in February 2009 for a total purchase price of $3.2 million.
On May 15, 2009, McAfee announced its intention acquire Solidcore Systems, a privately held security company, for $33 million. Solidcore was a maker of software that helped companies protect ATMs and other specialized computers. The acquisition integrated Solidcore's whitelisting and compliance enforcement mechanisms into the McAfee product line. The deal closed on June 1, 2009.
On July 30, 2009, McAfee announced plans to acquire managed email and web security vendor MX Logic. The acquisition provided an enhanced range of SaaS-based security services such as cloud-based intelligence, web security, email security, endpoint security and vulnerability assessment. The deal closed on September 1, 2009 at a price of $140 million. MX Logic staff were integrated into McAfee's SaaS business unit.
On May 25, 2010, McAfee announced a definitive agreement to acquire Trust Digital, a privately held online security company that specialized in security for mobile devices. The acquisition allowed McAfee to extend its services beyond traditional endpoint security and move into the mobile security market. The acquisition closed on June 3, 2010. The price for Trust Digital was not disclosed.
On July 29, 2010, McAfee announced a definitive agreement to acquire tenCube, a privately held online security company that specialized in anti-theft and data security for mobile devices. The acquisition allowed McAfee to complete its diversification into the mobile security space, and announce its plans to build the next generation mobile platform. The acquisition closed on August 25, 2010.
On March 23, 2011, McAfee announced its intention to acquire privately owned Sentrigo, a leading provider of database security, including vulnerability management, database activity monitoring, database audit, and virtual patching--which ensure databases are protected without impacting performance or availability. The acquisition enabled McAfee to extend its database security portfolio. The acquisition closed on April 6, 2011.
On October 4, 2011, McAfee announced its intention to acquire privately owned NitroSecurity, a developer of high-performance security information and event management (SIEM) solutions that protect critical information and infrastructure. NitroSecurity solutions reduce risk exposure and increase network and information availability by removing the scalability and performance limitations of security information management. The acquisition closed on November 30, 2011.
On February 26, 2013 McAfee announced it had acquired the ValidEdge sandboxing technology.
On July 8, 2013 McAfee completed the tender offer for Finnish network firewall design company Stonesoft Oyj worth $389 million in cash, or about $6.09 a share. The Next Generation Firewall business acquired from Stonesoft was divested to Forcepoint in January 2016.
On December 1, 2014 Intel Security announced the acquisition of PasswordBox, a Montreal-based provider of digital identity management solutions. Financial terms were not disclosed.
In November 2017, McAfee acquired Skyhigh Networks, a CASB security company.  The acquisition closed January 3, 2018. 
In August 2019, McAfee acquired NanoSec, a container security company. 
In March 31, 2020, McAfee acquired Lightpoint Security, which will extend the capabilities of multiple McAfee products. The amount of this acquisition remains undisclosed.
On January 4, 2006, the Securities and Exchange Commission filed suit against McAfee for overstating its 1998-2000 net revenue by US$622,000,000. Without admitting any wrongdoing, McAfee simultaneously settled the complaint, and agreed to pay a $50 million penalty and rework its accounting practices. The fine was for accounting fraud; known as channel stuffing that served to inflate their revenue to their investors.
In October 2006, McAfee fired its president Kevin Weiss, and its CEO George Samaneuk resigned under the cloud of a recent SEC investigation which also caused the departure of Kent Roberts, the General Counsel, earlier in the year. In late December 2006 both Weiss and Samaneuk had share option grant prices revised upwards by McAfee's board. Weiss and Roberts were both exonerated of all wrongdoing from the claims of McAfee in 2009.
On April 21, 2010, beginning at approximately 14:00 UTC, millions of computers worldwide running Windows XP Service Pack 3 were affected by an erroneous virus definition file update by McAfee, resulting in the removal of a Windows system file (svchost.exe) on those machines, causing machines to lose network access and, in some cases, enter a reboot loop. McAfee rectified this by removing and replacing the faulty DAT file, version 5958, with an emergency DAT file, version 5959 and has posted a fix for the affected machines in their consumer knowledge base. The University of Michigan's medical school reported that 8,000 of its 25,000 computers crashed. Police in Lexington, Ky., resorted to hand-writing reports and turned off their patrol car terminals as a precaution. Some jails canceled visitation, and Rhode Island hospitals turned away non-trauma patients at emergency rooms and postponed some elective surgeries. Australian supermarket Coles reported that 10% (1,100) of its point-of-sales terminals were affected and was forced to shut down stores in both western and southern parts of the country. As a result of the outage, McAfee implemented additional QA protocols for any releases that directly impacted critical system files. The company also rolled out additional capabilities in Artemis that provide another level of protection against false positives by leveraging a whitelist of hands-off system files.
In August 2012, an issue with an update to McAfee antivirus for home and enterprise computers turned off the antivirus protection and, in many cases, prevented connection to the Internet. McAfee was criticized for being slow to address the problem, forcing network operations to spend time diagnosing the issue.
On October 6, 2020, the founder of antivirus software company, John McAfee, got arrested in Spain. He was accused of failing to file US tax returns from 2014 to 2018 and hiding assets, including real estate, a vehicle and a yacht, in the name of others.
^"McAfee DAT Reputation Technology". McAfee. 2017. Retrieved 2017. McAfee DAT Reputation technology can prevent endpoints from updating to a DAT that has been seen to cause unpredicted results in the field.
Haminghton, Suzie, ed. (2004). Computer Science. New Delhi: Lotus Press. p. 55. ISBN9788189093242. Retrieved 2017. When referring to a virus protection program such as McAfee, DAT refers to the file used to update the virus protection software with the latest updates.
^"McAfee, Inc.: Lit. Rel. No. 19520" (Press release). US Securities and Exchange Commission. January 4, 2006. While engaging in this "channel stuffing," McAfee improperly recorded the sales to distributors as revenue.