John David McAfee (born September 18, 1945) is a British-American computer programmer and businessman. He founded the software company McAfee Associates in 1987 and ran it until 1994, when he resigned from the company. McAfee Associates achieved early success as the creators of McAfee, the first commercial antivirus software, and the business now produces a range of enterprise security software. The company was renamed to Intel Security in 2011 after being purchased by Intel, though the software still retains the McAfee brand name.
He is also a political activist who sought the Libertarian Party nomination for President of the United States in the 2016 election, losing to former New Mexico governor Gary Johnson.