Apple has released macOS Sierra 10.12.5 for download. The update brings some bug fixes and several improvements.
What's New In This Version: The macOS Sierra 10.12.5 update improves the security, stability and compatibility of your Mac.
This update: • Fixes an issue where audio may stutter when played through USB headphones • Enhances compatibility of the Mac App Store with future software updates • Adds support for media-free installation of Windows 10 Creators Update using Boot Camp
You can download macOS Sierra from the App Store for free.
Bought a pair of Bose QC35's in March. I was promised it's among the best noise cancelling earphones on the market, so Imagine my surprise when the audio totally sucked from my Mac. I nearly returned the things, till I saw this update and realized, "I wasn't alone in this???" Everything's working flawlessly now. Highly recommended if you have a pair of (especially if they're expensive) bluetooth earphones...