View and enter lyrics in Music on Mac
If you’re an Apple Music subscriber, you can view lyrics for the currently playing song, when available.
For other songs, you can enter the lyrics in Music and view them at any time. You can’t add lyrics to some types of files, such as WAV and QuickTime.
Note: Not all features are available in the Apple Music Voice Plan. Apple Music, Apple Music Voice, lossless, and Dolby Atmos aren’t available in all countries or regions. See the Apple Support article Availability of Apple Media Services.
View song lyrics for the currently playing song
In the Music app
on your Mac, click any option below Library in the sidebar. For example, click Albums to see all the albums in your library.Move the pointer over any song, then click the Play button
.Click the Lyrics button
.If available, the lyrics appear in time with the music, so you can follow along as you listen.
If you subscribe to Apple Music, songs available in lossless have the Lossless button
next to them; songs available in Dolby Atmos have the Dolby button 
next to them.Do any of the following in the Lyrics window:
Jump to a certain verse: Scroll, then select any line.
View the Full Screen Player: Choose Window > Full Screen Player. See Use Music MiniPlayer.
Close the Lyrics window: Click the Lyrics button again.
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.
To sync custom lyrics across your devices, you need a subscription to Apple Music or iTunes Match.