This update to iTunes adds support for iOS 9 and is designed for OS X El Capitan.
● Improves Apple Music accessibility with VoiceOver
● Resolves a problem that prevented reordering of songs within Up Next
● Fixes a problem where some radio stations did not appear within Recently Played
● Addresses an issue where songs you loved on iOS did not appear loved on iTunes
● Supports two-factor authentication to secure your Apple ID
This update also includes improvements to overall stability and performance.
You can get the update from the Updates tab in the Mac App Store.