Sites like Pirate Bay contain many “mac os x 10.12 sierra iso 64 bit top” but have extremely high malware rates. Keyloggers and miners are common. Avoid unless you are an expert.
Steer clear of random file-sharing blogs, untrusted torrents, or pre-made "Hackintosh" distros (like Niresh or Zone). These images are frequently modified, insecure, and can inject malware into your host system or virtual environment. How to Convert an Official Apple DMG to a Bootable ISO mac os x iso download 64 bit top
What (Windows, macOS, Linux) you are currently using to build this? Sites like Pirate Bay contain many “mac os x 10