John David McAfee (* September 18, 1945 at a U.S. military base in Scotland, United Kingdom, according to other sources in Sling, Gloucestershire; † June 23, 2021 in Sant Esteve Sesrovires, Barcelona) was a British/U.S. entrepreneur, programmer, and one of the pioneers in the development of antivirus and computer security software. John David McAfee  September…