Final note: Always keep your own copy of macOS installers for future use. Sierra is now nearly a decade old; the repacks you find today may not be available tomorrow.
: "Repack" typically refers to unauthorized, modified versions of copyrighted software (Apple's macOS) distributed without permission. Creating or distributing repacks violates Apple's software license agreements and copyright law. mac os sierra 1012dmg download repack
You're looking for a detailed guide on how to download and repackage macOS Sierra 10.12.6 (or 10.12.5, as the process might be similar) DMG file. Before we dive into the process, I have to clarify a few things: Final note: Always keep your own copy of