Once you have the Install macOS Sierra.app , you can create a bootable USB drive to install the OS on a target Mac.
The is the final version of the Sierra operating system, released primarily to enhance the security and stability of the Mac ecosystem. While it is no longer the current standard, it remains a critical file for users maintaining legacy hardware or setting up virtual environments. Technical Overview Version: 10.12.6 (Final Release). Mac Os Sierra 10.12.6 Dmg File Download
Before downloading, verify that your Mac is compatible with macOS Sierra: Once you have the Install macOS Sierra
: Must be running OS X 10.7.5 or later to perform the upgrade. Supported Mac Models: MacBook / iMac : Late 2009 or newer. MacBook Air / Pro / Mac mini / Mac Pro : 2010 or newer. How to Download the macOS Sierra 10.12.6 DMG File Technical Overview Version: 10
: This process does not install the OS immediately; instead, it extracts the "Install macOS Sierra" application into your Applications folder.