On Dec. 6 2017 Apple released an update for all devices Mac / MacBook, compatible with macOS High Sierra. This update does not bring visible changes for users, but solves some functionality issues. In addition, there are security changes / patches, about which Apple but it does not offer too many details.
Stability and compatibility updates brought in macOS High Sierra 10.13.2
- improves the compatibility of audio devices connected by USB
- Improves navigation with VoiceOver in PDF files opened with the Preview application
- Improves Braille and Mail compatibility. (application that allows blind people to use the Braille alphabet pe Mac)
This update by macOS is recommended for running devices macOS High Sierra 10.13.1. For all other systems with macOS Hight Sierra, installation is recommended macOS High Sierra 10.13.2.
With this system update, one was released iTunes. The iTunes 12.7.2 version brings minor changes that we do not know much about.
The update is available via the App Store → Updates and requires a system restart.[Mac Update] macOS High Sierra 10.13.2 & iTunes 12.7.2