This disambiguation page is about the acronym MAC (written in all caps). See also Mac.

MAC may refer to:

• Multiplexed Analogue Components, a high-definition television transmission standard.
• MAC (cosmetics), a brand of cosmetics
• MAC times, short for "Modification, Access, and Change" times in a computer file
• MAC, the ISO 3166-1 country code, Asian Games country code and FIFA country code for Macau
• Magnetic Accelerator Cannon a fictional weapon from Halo
• Mandatory access control, a technique to protect and contain computer processes, data, and system devices from misuse
• Media Access Control, a term in computer networking
• MAC address, the Media Access Control address of a networking device
• Membrane attack complex, one of the ultimate weapons of the immune system
• Mycobacterium avium complex, an group of environmental pathogens in the Mycobacterium genus.
• Merchant Aircraft Carrier ships
• Message authentication code, in cryptography
• Metropolitan Airports Commission, the operator of airports in the Minneapolis-St. Paul region of Minnesota
• Michigan Agricultural College, the name of Michigan State University from 1909 to 1925
• Mid-American Conference, a U.S. collegiate sports conference
• Mac (Birmingham), or the Midlands Arts Centre, a venue in Birmingham, England
• Migration Authorisation Code in Internet transfer
• Michigan Aerospace Corporation, a company in Ann Arbor, Michigan, USA
• Michigan Agricultural College, the name of Michigan State University from 1909 to 1925
• Military Airlift Command, the predecessor of the Air Mobility Command of the United States Air Force
• Minimum alveolar concentration, a term used in anaesthesia
• Casamancian Autonomous Movement, a now-defunct political party in Casamance, Senegal
• In the plain old telephone service, "moves, adds, and changes", a set of administrative tasks
• Multiply-accumulate, a computer arithmetic operation, common in digital signal processor contexts
• Archaeology Museum of Catalonia, an archaeology museum in Catalonia
• Musical Arts Conference, a marching band competition circuit
• Project MAC, a project known for releasing MACLISP, an old version of the computer programming language LISP
• Mudiad Amddiffyn Cymru, a Welsh republican organization responsible for a number of bombing incidents between 1963 and 1969
• Maranhão Atlético Clube, a Brazilian football (soccer) club

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