The update can be found in the For You section of Apple Music, with each playlist housing 25 songs. My New Music Mix contains all-new music from artists that the Apple Music curators have picked based on each user's listening habits, and updates with new options every Friday. My Favorites Mix is full of "the songs you love and more," meaning it's focused on music users have already listened to rather than introducing them to new content. That playlist is updated every Wednesday.
Similar to other personally curated playlists in the For You tab, both My New Music Mix and My Favorites Mix can be subscribed to, placing them in the Library tab to become more easily accessible. On a smaller scale, each individual song can be added to the Library, and then downloaded to listen to offline.
Apple Music's new curation feature is akin to Spotify's Discover Weekly and Release Radar playlists, which recommends music from new artists and current favorite artists, respectively. Spotify updates Discover Weekly every Monday and Release Radar every Friday.
New iOS updates, like Apple Music's personally-tailored music curation playlists, are predicted to be topics of discussion at Apple's September 7 event next week. Otherwise, it's expected that focus will be on the debut of the iPhone 7 and iPhone 7 Plus and Apple Watch 2.