Apple provides standalone update packages on its support site. These are , but rather updates for users already on macOS Mojave:
Once you have downloaded the installer application (usually named "Install macOS Mojave.app"), you can create a bootable DMG or USB stick to perform a clean install. the installer from the App Store. Locate the installer in your /Applications folder. Insert a USB flash drive (minimum 16GB). Download Mac Os Mojave 10.14 6 Dmg
If you already have a version of Mojave and just need to reach 10.14.6, Apple offers standalone DMG update files: macOS Mojave 10.14.6 Update (approx. 2.67 GB). macOS Mojave 10.14.6 Combo Update (larger file, installs over any previous version of 10.14). macOS Mojave 10.14.6 Supplemental Update (approx. 1.26 GB, for existing 10.14.6 users). 2. Alternative Direct Download Methods Apple provides standalone update packages on its support
Open Terminal and use the following command to download the latest available Mojave installer to your /Applications Locate the installer in your /Applications folder