macOS Catalina 10.15

Enter and view lyrics in Music on Mac
If you’re an Apple Music subscriber, you can view lyrics for the currently playing song. You can also enter a song’s lyrics in Music and view them at any time. You can’t add lyrics to some types of files, such as WAV and QuickTime.
View song lyrics for the currently playing song
In the Music app
on your Mac, click any option under Library in the sidebar. For example, click Albums to see all the albums in your library.
Double-click a song to play it or click the Play button
(or use the Touch Bar).
Click the Lyrics button
.
Enter song lyrics
In the Music app
on your Mac, Control-click a song, then choose Get Info.
Click Lyrics, then select Custom Lyrics at the bottom of the window.
Enter the words to the song, then click OK.