10.12 Sierra |link| Download -

Because Apple hides older operating systems from the Mac App Store when a newer version is installed, downloading Sierra requires a specific "backdoor" link.

Apple provides a direct download for older versions of macOS that are no longer available on the standard App Store search. 10.12 sierra download

: Access the macOS Sierra 10.12 download page via Safari to get the InstallOS.dmg file. Installation Steps : Because Apple hides older operating systems from the

Here is a solid guide on how to safely download macOS Sierra, check compatibility, and create a bootable installer. and create a bootable installer.