Macos Mojave 10.14.b1 — (18a293u)

As of November 2021, macOS 10.14 Mojave is unsupported and does not receive security updates.

The major visual update allowed users to switch the entire user interface to a dark theme. macOS Mojave 10.14.b1 (18A293u)

Early beta users reported issues with the App Store, sometimes requiring users to sign out and back in. As of November 2021, macOS 10

This was the final version of macOS to support 32-bit applications. Important Considerations (Historical) As of November 2021

Based on your query, 14.b1 (Build 18A293u) , which was released in June 2018. Key Features of Mojave 10.14 Beta (18A293u)

A new, more robust screenshot utility (similar to iOS) with on-screen tools.