MakeUseOf: “Closed captions can be a great addition to your Mac in case of language barriers or hearing impairments. Many also choose to enable captions simply as a personal preference. They can be used for adding captions for movies or TV shows to make it much easier to follow what people are saying. But you may choose to use them for accessibility reasons as well. Closed captions are very easy to use on your Mac. You can enable them using the Subtitles for the Deaf or Hard-of-Hearing (SDH) feature that is present in the accessibility settings in macOS, which then makes them appear whenever you are watching a video with closed captions available…”