https://wccftech.com/macos-10-14-1-beta-4-released-developers-should-update-now/

macOS 10.14.1 beta 4 is now available for registered developers and it’s highly recommended that you update now if your’e testing the software on your Mac.

Apple is almost done adding refinements to its next lineup of software updates, and it’s expected that we will see the final release some time later this month alongside the release of iPhone XR. Before that happens though, we have macOS 10.14.1 beta 4 to fiddle around with which is packed with bug fixes and performance related enhancements.