McKinley is a new Mac application designed for creating and editing custom SF Symbols. Developed by Amy Worrall, it offers a comprehensive studio environment for drawing and annotating these symbols. The app integrates vector tools with an understanding of the SF Symbols structure. This allows users to edit a single set of objects across various weights, sizes, and colors simultaneously. McKinley supports importing SVG files or starting new designs from scratch. It provides a live preview using Apple's official renderer. Users can also export their creations directly to Xcode. The application boasts extensive AppleScript support with useful example scripts. It also features Quick Look previews and thumbnails for its documents. McKinley comes with a well-written and comprehensive user manual. This professional-grade tool is available for a $60 one-time purchase, with a limited-time 15% launch discount.