Suppressed clang -Wdeprecated-declarations warning
kUTTypeFileURL is deprecated starting with macOS 12.0 but its replacement, UTTypeFileURL, is in UniformTypeIdentfiers.framework which doesn't exist on older versions of macOS. Conditionally using it would require conditionally linking to that new framework, which just isn't worth the hassle when both are just syntactic sugar for the string "public.file-url".