Create a Smart Playlist in Music on Mac
Music can create playlists based on rules you specify, and then update these playlists automatically as your library changes.
For example, you could create a Smart Playlist that includes your most highly rated rock songs that were released before 1990. When you import songs from a CD, they’re added automatically to the Smart Playlist if they meet the criteria.
Smart Playlists you create have this icon 
next to them.
Create a Smart Playlist
In the Music app
on your Mac, choose File > New > Smart Playlist.Specify your rules.
To add another set of rules within a rule, hold down the Option key, then click the Nest button
. (when you hold down the Option key, the Add button 
changes to the Nest button ).
View and edit Smart Playlists
In the Music app
on your Mac, select a Smart Playlist in the sidebar on the left.Do any of the following:
Change a Smart Playlist: Click Edit Rules.
Change the order of songs: Choose View > Sort By.
Remove a Smart Playlist: Press the Delete key.