The OS X 10.11.2 update can be downloaded through the Software Update mechanism in the Mac App Store. It is currently rolling out to all users who are running OS X El Capitan and should be available soon.
Throughout the beta testing period, OS X 10.11.2 did not appear to include any outward-facing changes, instead focusing on under-the-hood bug fixes and performance improvements to address issues discovered since the launch of OS X 10.11.1. Bug fixes introduced in today's update were outlined in Apple's release notes and are listed below.
The OS X El Capitan 10.11.2 update improves the stability, compatibility, and security of your Mac.OS X El Capitan has only been available for two months, but it has already received multiple updates to address bugs and other issues. Apple will continue to push regular updates to El Capitan to keep it running smoothly until the next major operating system update, expected in late 2016.
-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
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