https://wccftech.com/apple-releases-macos-mojave-10-14-6-supplemental-update-with-fix-for-wake-from-sleep-bug/

Apple has seen fit to release a supplemental update of macOS Mojave 10.14.6 that carries a fix for the wake from sleep bug. The new build arrives a week and a half after the company released the initial macOS Mojave 10.14.6 update to users. If you have a compatible Mac, you can download the latest build right now. Let’s dive in to see some more details on the supplemental update and whether it brings anything new to the table.

As we have mentioned earlier, macOS Mojave 10.14.6 Supplemental Update can be downloaded on your supported Mac machines through the “Software Update” mechanism section of System Preferences. Selecting the Update Now option will download and install the latest build on your machine.