If you’re looking to upgrade your movie-watching experience, streaming in 4K is the way to go.
One of the most convenient and reliable options to stream movies from Mac to TV is the Elmedia Video Player.

Elmedia Video Player is a versatile media player that supports a wide range of file formats and has built-in support for streaming to Chromecast and other devices. With the Elmedia Player, you can easily stream your favorite movies from your Mac to your TV and enjoy them on a larger screen.

After reading this article https://www.elmedia-video-player.com/blog/best-4k-movies/ you can learn how to stream from Mac to TV and there is a list of the best 4K movies to watch that are available to stream right now.