Apple today seeded the third beta of an upcoming macOS Mojave 10.14.6 update to developers, two weeks after seeding the second macOS Mojave 10.14.6 beta and more than a month after the release of macOS Mojave 10.14.5, which brought AirPlay 2 support for third-party TVs.
The new macOS Mojave 10.14.6 beta can be downloaded through the Software Update mechanism in System Preferences after the proper profile has been installed from Apple’s Developer Center.
There were no new features or significant changes discovered in the first two betas of macOS Mojave 10.14.6, which indicates it likely focuses on bug fixes and performance improvements for issues that weren’t able to be addressed in the macOS Mojave 10.14.5 update.
Read more at MacRumors.com