Macos Mojave 10.14.b1 (18a293u) -

As the first beta, this build contained bugs and was intended for developers testing app compatibility with Xcode 10.

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

If you are creating this for historical research, building a virtual machine, or restoring an old Mac, ensure you have a backup of the original 10.14 installer file, as it was removed from the App Store in 2021. What are you using this 10.14.b1 build for? Are you ? Are you trying to re-install it on an old Mac ? Are you developing software (testing against this old SDK)? As the first beta, this build contained bugs

The major visual update allowed users to switch the entire user interface to a dark theme. What are you using this 10

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

Introduced Gallery View, allowing users to browse files visually, along with enhanced metadata in the preview pane.

Automatically organizes files on the desktop by kind, tag, or date.