App icon

The icon is an Icon Composer file in git: Icon/AppIcon.icon, a folder with icon.json and SVG layers in Assets/. You write both by hand. macOS adds the glass, the highlights, the shadow, the mask, and the dark, tinted, and clear looks. You never draw those yourself.

• tools/make_icon.sh compiles it with actool into Resources/Assets.car and Resources/AppIcon.icns. build.sh runs it when the icon changed.
• tools/icon_review.sh renders it with ictool (Icon Composer's command line tool, inside Xcode) into one contact sheet you read.

Older app without these files: copy Icon/, tools/make_icon.sh, tools/icon_review.sh, and tools/icon_sheet.swift from the new-mac-app template, the icon block of its build.sh, and CFBundleIconName = AppIcon from its Info.plist.in.