: If you are already running macOS Sierra 10.12.5, you can use the macOS Sierra 10.12.6 Update (approx. 1.11 GB) to reach the final version. Combo Update
Downloading the macOS Sierra 10.12.6 DMG file requires specific steps because it is an older version no longer featured on the Mac App Store's main page. You can still obtain it directly from Apple's servers using the following methods. Official Direct Download from Apple Mac Os Sierra 10.12.6 Dmg File Download
However, if you're looking for a direct DMG file download, you can try the following: : If you are already running macOS Sierra 10
Verify the installer:
Before downloading and installing macOS Sierra 10.12.6, ensure that your Mac meets the system requirements: Mac Os Sierra 10.12.6 Dmg File Download