https://wccftech.com/apple-has-released-beta-1-of-macos-mojave-10-14-3-and-tvos-12-1-2-to-developers-heres-what-is-new/

Today, Apple has seen fit to release the first beta of its upcoming macOS Mojave 10.14.3 and tvOS 12.1.2 to developers for testing purposes. Since this is the first beta, it would be interesting to see if the company has added any forward facing addition to the table. If you’re interested, the beta 1 of macOS Mojave 10.14.3 and tvOS 12.1.2 are now available to download, so be sure to gear up your Mac and Apple TV devices. Let’s see some more details on the matter.

If you’re interested in checking out the new macOS Mojave 10.14.3 beta 1 update for yourself, registered developers can download the appropriate configuration profile through the Apple Developer Center. The update can be installed via the Software Upgrade mechanism present in System Preferences.