Apple today seeded the first beta of an upcoming macOS Mojave 10.14.3 update to developers, five days after releasing macOS Mojave 10.14.2, which addressed an issue with external displays and included other bug fixes.
The new macOS Mojave 10.14.3 beta can be downloaded through the Software Update mechanism in System Preferences after the proper profile has been installed from Apple’s Developer Center.
We don’t yet know what improvements the second update to macOS Mojave will bring, but it is likely to include bug fixes and performance improvements for issues that weren’t able to be addressed in the macOS 10.14.2 update.
Read more at MacRumors.com