Apple Icon Image format
| Filename extension |
.icns |
|---|---|
| Internet media type | image/x-icns |
| Type code | icns |
| Uniform Type Identifier (UTI) | com.apple.icns |
| Magic number | 69 63 6e 73 |
| Developed by | Apple Inc. |
| Type of format | Icon file format |
The Apple Icon Image format (.icns) is an icon format used in Apple Inc.'s macOS. It supports icons of 16 × 16, 32 × 32, 48 × 48, 128 × 128, 256 × 256, 512 × 512 points at 1x and 2x scale, with both 1- and 8-bit alpha channels and multiple image states (example: open and closed folders). The fixed-size icons can be scaled by the operating system and displayed at any intermediate size.
As of macOS 11, asset catalogs are the preferred file format for macOS custom icons.