Macsome Inc. is a software development company including iTunesConverter, Audio book Converter, audio recorder, audio editor, Audio Splitter
Waveform Audio File Format (WAVE, or more commonly known as WAV due to its filename extension) (rarely, Audio for Windows) is a Microsoft and IBM audio file format standard for storing an audio bitstream on PCs.
Since users can use iTunes Music Converter V2.1.6 on iTunes 12.6, if they could disabled System Integrity Protection. Or for macOS 10.11 (El Capitan) users, they can downgrade iTunes 12.6 to iTunes 12.5.
Later days Apple released iTunes 12.6 with a “Rent once, watch anywhere” new feature, which lets lets iTunes users watch iTunes movie rentals across all devices with iOS 10.3 or tvOS 10.2.