A couple of days ago, Apple rolled out the first beta of OS X 10.11.4 to developers, with the first public beta being released earlier today. At first glance, OS X 10.11.4 does not bring much to the table, but Apple did snuck in two minor yet useful features with this update.
The first one is the ability to view Live Photos directly from within the Messages app in OS X. Previously, only the stock Photos app in OS X supported Live Photos that were shot from the iPhone 6s and iPhone 6s Plus. Other system apps like Mail, Safari and Notes still don’t support viewing of Live Photos in the first beta of OS X 10.11.4, though it might be possible that Apple adds the functionality to them with the final release of the OS.
Another new feature that Apple has included in the first beta of OS X 10.11.4 is the ability to password protect notes in the Notes app. The company added similar functionality to the Notes app in iOS with the first beta of iOS 9.3.
Live Photos is a new feature that is available exclusively on the iPhone 6s and iPhone 6s Plus. In a nutshell, Live Photos are like a 3-second GIF (with better quality obviously!), with the initial 1.5 second containing shots that were taken before the shutter button is pressed and the next 1.5 second containing shots after the shutter button is pressed. They add a hint of animation to a photo that makes it more lively.