McKinley draws SF Symbols with actual fills, strokes, and knockouts instead of forcing you to flatten every shape into paths by hand, then previews the result using Apple’s own SF Symbols renderer so what you see is what ships. It switches between the three required weights — ultralight, regular, black — letting you vary line width or geometry per weight before exporting straight into an asset catalog. Alpha software, TestFlight only; the developer is still adding features ahead of a planned €49 one-off price.