This update resolves an issue that may prevent iTunes from playing media to third-party AirPlay speakers. It also includes minor app and performance improvements.
10.11 and 10.12 users download iTunes 12.8.2 here. 10.10.5 users download iTunes 12.8.1 here
System Requirements
Hardware:
• Mac computer with an Intel processor
• To play 720p HD video, an iTunes LP, or iTunes Extras, a 2.0GHz Intel Core 2 Duo or faster processor is required
• To play 1080p HD video, a 2.4GHz Intel Core 2 Duo or faster processor and 2GB of RAM is required
• Screen resolution of 1024x768 or greater; 1280x800 or greater is required to play an iTunes LP or iTunes Extras
• Internet connection to use Apple Music, the iTunes Store, and iTunes Extras
• Apple combo drive or SuperDrive to create audio, MP3, or back-up CDs; some non-Apple CD-RW recorders may also work. Songs from the Apple Music catalog cannot be burned to a CD
Software:
• macOS version 10.11.4 or later
• 400MB of available disk space
• Apple Music, iTunes Store, and iTunes Match availability may vary by country
• Apple Music trial requires sign up