macOS Mojave 10.14.3 can be downloaded by going to the "Software Update" section of System Preferences, a new installation method that was introduced with the Mojave update.
macOS Mojave 10.14.3 brings performance improvements and bug fixes for issues discovered since the launch of macOS 10.14.2. During the beta testing period, we didn't find any major feature changes. According to Apple's release notes, the update improves the security, stability and compatibility of your Mac and is recommended for all users.
This update improves the security, stability, and compatibility of your Mac and includes the following enterprise content: When making a file-sharing connection that uses a valid Kerberos TGT to authenticate, users are no longer prompted to enter credentials.Additional details on the macOS Mojave operating system can be found in our dedicated macOS Mojave roundup.