macOS Mojave 10.14.3 beta 2
Apple Seeds their new MacOS 10.14.3 beta 2 for the developers which has a lot of bugs fixes and which will help improve user experience The macOS 10.14.3 beta 2 SDK provides support for developing apps for Macs running macOS Mojave 10.14.3. The SDK comes bundled with Xcode 10.1 available from the Mac App Store. For information on the compatibility requirements for Xcode 10.1, see Xcode Release Notes. Update your apps to use new features, and test your apps against API changes.
Article Source : Apple.com