What is MAC? What Opens a MAC? File Format List from WhatIs.com

File Extension

MAC File Format

Macro (Generic)

MAC is a file extension for a macro file format used by many programs. A macro file stores a sequence of commands for quick and often repeated functions. When the user types a keyboard shortcut for a particular macro, the tasks programmed into that macro are conducted.  

Many applications have built-in macros and many also allow users to create their own.


Learn more about MAC files:

Read about macro viruses at Search Security.

Find answers about macros at IT Knowledge Exchange.

See our Browser Shortcut Cheat Sheets.

About.com explains working with macros in Word.

This was last updated in August 2010
Editorial Director Margaret Rouse

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