OpenCore Legacy Patcher '' (OCLP), developed by engineer Mykola Grimaljok, is a project that aims to make the latest macOS provided by Apple run on older Macs that are no longer supported. .

The OpenCore Legacy Patcher won't be offering day-one support for macOS Sonoma on older Macs, with support now expected to arrive on October 2.

OpenCore Legacy Patcher follows the same logic, but applies it to allow older and officially unsupported Macs to run newer releases of macOS.