It’s update release day for Apple today, as iOS 10.3.2, along with tvOS 10.2.1, watchOS 3.2.2 were pushed out earlier. Also new is macOS Sierra 10.12.5, plus iTunes 12.6.1 (enough version numbers for you yet?).
The macOS Sierra update says it fixes an issue with audio stutter some users have been experiencing with USB headphones, while also “enhances compatibility” of the Mac App Store with future software updates. Also new is the support for media-free installation of Windows 10 Creators update with Boot Camp.
As for iTunes 12.6.1, Apple says this update comes with “minor app and performance improvements.”
You can get both updates by going to the Updates tab in the Mac App Store.