Yes, but you cannot create a bootable macOS installer from Windows reliably. Use the InstallOS.dmg file on a Mac to extract the app.
Once you have the DMG, treat it like gold: store a copy on an external drive, verify its checksum, and use it only on hardware that Apple originally supported. With the 10.12.6 combo update applied, Sierra remains a rock-solid, fast operating system for vintage Intel Macs. Download Mac Os Sierra 10.12 Dmg
Q: Can I install macOS Sierra on a non-Apple computer? A: No, macOS Sierra is designed to run only on Apple computers. Yes, but you cannot create a bootable macOS
The download is roughly . Wait for InstallOS.dmg to finish. verify its checksum