Use this Python script to download macOS directly from Apple's servers. Run gibMacOS.bat and select the version you need (e.g., macOS Sonoma or Ventura).
—which contains the full macOS image rather than just a recovery stub—is the most reliable way to ensure a smooth installation. In this guide, we will walk through how to build one entirely within a Windows environment. Prerequisites Before we dive in, make sure you have the following ready: A USB Drive: At least 16GB (USB 3.0 is preferred for speed). OpenCore Legacy Patcher (OCLP) or Python: Specifically, we will use the macrecovery tool or a third-party downloader like A Stable Internet Connection: You only need this once to download the full installer. Step 1: Download the macOS Full Installer opencore offline installer windows