Download macOS Mojave 10.14.3 Combo Update
The macOS Mojave 10.14.3 update improves the security, stability and compatibility of your Mac, and is recommended for all users.
For more detailed information about this update, please visit: https://support.apple.com/kb/HT209149
For detailed information about the security content of this update, please visit: https://support.apple.com/kb/HT201222