macOS Sierra is a major release of Apple's macOS operating system, which was announced on June 5, 2016, and released on September 20, 2016. The ISO image for macOS Sierra is typically used for installing the operating system on a Mac or for creating a bootable USB drive.
There’s no “proper” public ISO for Sierra. You must source the installer from Apple via a Mac. If you need Sierra for testing, consider using an older physical Mac or upgrading to a newer macOS version still supported by Apple. macos sierra iso
: Seamlessly copy and paste text or images between your Mac and nearby iOS devices. macOS Sierra is a major release of Apple's
macOS Sierra (version 10.12) marked a pivotal moment for Apple, rebranding the desktop software from "OS X" to "macOS" to align with iOS, watchOS, and tvOS. While it is no longer the current operating system, many users still seek a for legacy hardware support, testing in virtual machines like VirtualBox, or creating bootable recovery media. Why You Might Need a macOS Sierra ISO You must source the installer from Apple via a Mac
The safest way to get the installer is directly from Apple Support .
You can still download the original installer through Apple Support or the Mac App Store. This will typically be an InstallOS.dmg file. Option B: Create Your Own ISO (Recommended)