Niresh created a patched version of the Mavericks installation DMG file, which allowed users to install macOS Mavericks on non-Apple hardware, also known as Hackintoshes. This was a significant achievement, as Apple's operating system was (and still is) designed to run exclusively on Apple-branded devices.
You're referring to Niresh's Mavericks DMG (Damage) Work! niresh mavericks dmg work
Keep in mind that Niresh's work, like other Hackintosh-related projects, may not be officially supported by Apple. Users should always ensure they comply with Apple's End User License Agreement (EULA) and respect intellectual property rights. Niresh created a patched version of the Mavericks