This release is mainly for Carthage users: the previous release had it's binaries compiled against the Xcode 7.3 beta tools. This release is compiled using the release version of Xcode 7.2.
MagicalRecord 2.3 is the final 2.x point release of MagicalRecord. It is also the final release that will support the iOS 6 and OS X 10.8 SDKs.