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.ICNS File Extension

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File TypeMac OS X Icon Resource File

DeveloperApple
Popularity
4.3 (19 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySystem Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

Definition

Icon file used by Mac OS X applications; stores one or more images, typically which were originally .PNG files; supports 1-bit and 8-bit alpha channels; used for displaying the application icon in the Mac OS X Finder and in the OS X dock.

More Information

ICNS files are generally located within the Contents/Resources/ directory inside the application package. They are also referenced by the application's .PLIST file (Info.plist) using the CFBundleIconFile property.

Mac OS X icon files can be viewed with the Apple Preview program included with Mac OS X. They can also be created using Icon Composer, another utility included with Mac OS X. ICNS files support icon images of 16x16, 32x32, 48x48, 128x128, 256x256, and 512x512 pixels, as well as 1024x1024 pixels as of Mac OS X 10.8 Mountain Lion.

Program(s) that open .ICNS files
Microsoft Windows LogoWindows
Axialis IconWorkshop
Inkscape
XnViewMP
Microsoft Windows Explorer
with the XnShell extension
Mac OS X LogoMac OS
Apple Preview
Apple Icon Composer
Icon Machine
Iconographer
Folder Icon X
Inkscape
Snap Converter
Adobe Photoshop with IconBuilder for Macintosh plugin
XnViewMP
Linux LogoLinux
Inkscape
XnViewMP
Updated 7/15/2014