Share songs from a shared media library in Music on Mac
You can set up a maximum of five computers on a local network (such as a home Wi-Fi network) to share their media libraries with each other. If a shared computer is turned on and Music is open, you can play that computer’s shared items on other computers in the network but you can’t import the shared items into their libraries.
If you want to import items from media libraries on other computers in your home network, you can turn on Home Sharing. See Import media using Home Sharing in Music.
Share your library with other computers
On your Mac, choose Apple menu
in the sidebar, then click Sharing on the right. (You may need to scroll down.)Next to Media Sharing, click the Info button
, select “Share media with guests”, then click Options.To require users to enter a password before your shared items appear, select Require Password, then enter a password.
Select the playlists you want to share, or select “All songs, movies and TV shows”.
Click OK, then click Done.
You can share radio station links and certain audio files (MP3, Apple Lossless, AIFF, WAV and AAC).
Play items from a shared library
In the Music app
on your Mac, click the arrow 
next to Library, then choose a shared library.Move the pointer over any song, then click the Play button
.
Change the name of your shared library
If you share your entire library, its name appears in the Home Sharing menu on other local computers set up to look for shared libraries. You can change the name.
On your Mac, choose Apple menu
Next to Media Sharing, click the Info button
, type a new name in the Library Name field, then click Done.
Turn off sharing
On your Mac, choose Apple menu
Next to Media Sharing, click the Info button
, deselect “Share media with guests”, then click Done.