Version: 10.12.6 (16G29 / 16G2136)
Release Date: July 19, 2017 (last security update: 2020)
Reviewed on: MacBook Pro (Retina, 13-inch, Early 2015) & Mac mini (Late 2012)
Downloading macOS Sierra 10.12.6
Quick Recap for a Working Install:
It is the last version of macOS where the HFS+ file system remained the primary standard for all drive types, making it a "safe harbor" for data recovery tasks. The Challenge of the Download work download macos sierra 1012 6
Before you search for a download, you need to ensure that Sierra will actually run on your machine. Even if you get the file, it won't install on incompatible hardware. Review: macOS Sierra 10
Step-by-Step Retrieval: