Access your music library on all your devices
If you subscribe to Apple Music, you can make your entire music library available on all your devices when you’re signed in with the same Apple ID. You can access your library any time, whenever you’re connected to the internet.
Your music library can keep the following available in the cloud:
Up to 100,000 songs, not including songs (or music videos) purchased from the iTunes Store; files can be no larger than 200 MB
Music videos purchased in the iTunes Store
Playlists that include songs and music videos
Smart Playlist rules, which are applied on the computer or device they’re downloaded to
Note: Apple Music isn’t available in all countries or regions.
You can also make your music library available across devices with iTunes Match.
In the Music app on your Mac, choose Music > Preferences, click General, then select the Sync Library checkbox.
To turn on your music library on another device, do any of the following:
Another computer: In the Music app on your Mac, sign in to the iTunes Store using the same Apple ID that you used on the first computer, then choose Music > Preferences, click General, then select the Sync Library checkbox.
An iPhone, iPad, or iPod touch: On your device’s Home screen, tap Settings, tap Music, then tap to turn on Sync Library.
WARNING: If you choose to replace the music library on your iPhone, iPad, or iPod touch, the music files on the device are deleted. The original files are kept on the Mac you previously synced them from, and iTunes Store purchases are always available to download again.