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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
MAC - Extension Details
Date Added: February 09, 2008
File Extension:  .MAC
Description 1: The MAC file extension is used for the Image MacPaint. It refers to the bitmap graphics that was created by MacPaint for use in Macintosh computers. MacPaint is considered one of the very first painting program applications for the Mac. Back then, it was limited to supporting blackandwhite graphics as the original Mac computers sported monochrome monitors.
Description 2: .MAC file extension is linked with Microsoft Access Shortcut. This is the file extension for the shortcut file utilized/created by Microsoft Access a relational database management system that is packaged with MS Office Professional. It combines relational MS Jet Database Engine with graphical userinterface. It is one of the most widelyused database applications and it contains database content, forms, tables, queries and others.
Description 3: .MAC file extension is linked with Daqarta Extended Audio Data. This is the file extension for the extended audio data utilized by Daqarta is an application that utilizes your Windows sound card to produce highperformance FFT spectrum analysis and waveform, signal averaging, color spectograms, advanced options for personal/lab use and signal generation. .MAC file extension and Daqarta are owned and developed by Interstellar Research.
Description 4: .MAC file extension is linked with MacPaint Bitmap Image. MAC paint graphic is a monochrome MacPaint [graphic file] format. MacBinary is a header that is added to a Mac file in order to be converted into a PC format, and this can be reversed back to the original [Mac] file format. Mac image format usually requires 576 pixels with 720 lines. Converting image files into MacPaint format are padded or cropped to fit the required pixel size of 576720.
File Type:   Bitmap image file
Mode: Binary
Program(s) to Open:  Mac: Apple MacPaint, Apple QuickTime Playe
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