Go to https://github.com/dortania/OpenCore-Legacy-Patcher/releases

Double-click the ZIP file. macOS automatically extracts OpenCore-Patcher-GUI.app . Move this app to your folder.

Return to the main menu and click . This creates the custom EFI configuration for your specific Mac model. When prompted, select your USB drive (not your internal SSD yet) to install the OpenCore EFI folder. 4. Boot into OpenCore