iSwift is the best tool for Mac to convert your old Objective-C code and projects to Swift. With just a single click. Don't believe me? Why not try our little demo 100% online and judge for yourself? :-) Just type in some Objective-C, click Convert and that's it. At the right part of the screen, the converted - Swift - code will appear. Ready to use. However, if what you're looking for is a taste of the... real deal - the very app for MacOS - without any limitation and 100% free to try (for 24 full hours, no strings attached) - go on and download it. Feedback is always more than welcome!