AudFree Spotify Music Converter is available for both Windows (Windows XP, Vista, 7, 8, 10 (32-bit & 64-bit)) and Mac operating system (Mac OSX 10.8, 10.9, 10.10, 10.11, 10.12, 10.13, 10.14, 10.15), while NoteBurner Spotify Music Converter is compatible with most of the above systems except Mac OS X 10.8.