As well as releasing iOS 9.2 for the iPhone and iPad, Apple also released a new version of OS for the Mac in the form of OS X 10.11.2 El Capitan.
The OS X 10.11.2 El Capitan software update comes with a number of bug fixes and performance improvements, including some fixes for WiFi and Bluetooth, you can see what is included in the update below.
The OS X El Capitan 10.11.2 update improves the stability, compatibility, and security of your Mac.
This update:
-Improves Wi-Fi reliability
-Improves the reliability of Handoff and AirDrop
-Fixes an issue that may cause Bluetooth devices to disconnect
-Fixes an issue that prevented Mail from deleting messages in an offline Exchange account
-Fixes an issue that prevented importing photos from an iPhone to a Mac using a USB cable
-Improves iCloud Photo Sharing for Live Photos
The latest version of OS X El Capitan is now available to download, you can download the update by going to About > Software Update on your Mac.
Source MacRumors