Following today's "In the Loop" event, Apple has released a number of software updates for Mac OS X, including the El Capitan 10.11.4 Update, iTunes 12.3.3, OS X Server 5.1 and Apple Configurator 2.2.
Mac OS X El Capitan Update 10.11.4
New in "El Cap" is the ability to passcode protect notes stored in the Apple Notes app. This feature addition is in-line with today's iOS 9.3 system update which brings the same feature to iOS devices. The Notes app also gained new sorting capabilities too. If you are an Evernote user, or more correctly, an Evernote user looking to escape, Notes can now import Evernote files. Evernote importing is a feature that Microsoft recently released for the PC version of OneNote with the help of an optional Microsoft OneNote plug-in.
Also of note for Mac users is the addition of Live Photos being shared between OS X and iOS in the Messages app and AirDrop. iBooks also received an enhancement that allows iBooks to write PDF files into your iCloud account - making the PDF files available to all of your iCloud connected OS X and iOS devices.
iTunes 12.3.3 is a minor update that adds support for the new iPhone SE and the iPad Pro, the 9-inch flavor, to iTunes. iTunes is the only cross-platform software update that is also available on Windows 7/8.x/10 PCs.
OS X Server 5.1 and Apple Configurator 2.2
Both, OS X Server 5.1 and Configurator 2.2 received updates that add new features to support the new Profile Manager and iPads with shared configurations.