// // main.swift // getUtiFromExt // // Created by ataruchi on 2021/11/07. // import Foundation import UniformTypeIdentifiers //New framework for UTI, macOS11.0+ [Big Sur or later] if let argument = CommandLine.arguments.dropFirst().first { let ext: String = argument if let str = UTType.init(filenameExtension: ext) { print(str) } else { print("fail to search UTI: \(argument)") } }