Making App Icons for macOS
According to Apple’s Human Interface Guidelines, every app must provide an icon to be displayed in Finder, the Dock, Launchpad, and the App Store. An app should specify several different icons of different dimensions to suit different screen sizes and different situations.
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Here are the dimensions for macOS app icons:
| Name | Size (px) |
|---|---|
| icon-macos-16x16@1x.png | 16x16 |
| icon-macos-16x16@2x.png | 32x32 |
| icon-macos-32x32@1x.png | 32x32 |
| icon-macos-32x32@2x.png | 64x64 |
| icon-macos-128x128@1x.png | 128x128 |
| icon-macos-128x128@2x.png | 256x256 |
| icon-macos-256x256@1x.png | 256x256 |
| icon-macos-256x256@2x.png | 512x512 |
| icon-macos-512x512@1x.png | 512x512 |
| icon-macos-512x512@2x.png | 1024x1024 |
After creating all the icons, you should put them into a folder whose name is icon.iconset. The folder must have the .iconset extension. It might look a bit unusual for a folder to have an extension, but this extension is a signal to the system that the folder contains a set of icons.