This is a summary with some clarifications of what can be found in [[OpenCore Legacy Patcher|OCLP]]'s [documentation](https://dortania.github.io/OpenCore-Legacy-Patcher/START.html) - Download the **GUI application** from the [GitHub releases](https://github.com/dortania/OpenCore-Legacy-Patcher/releases). This guide was done on the MacBook Pro 13" 2014 using OCLP version 0.4.10. - Use the **built-in macOS installer** downloader to get the installation means for the new system. The installer will be added to the Applications folder. - Create the **installation media** using the menu entry. You will need a 16GB or more USB, and I was not able to boot from an USB SD card reader, so you need an actual USB. It will be formated. - Once the installation is done, use the ***Build and Install OpenCore*** entry menu to compile the patch and install it on the USB drive. - **Boot from the USB** drive by pressing `Option` while booting the system. Select the entry with the OpenCore Legacy Patcher icon and then the installer. - It should boot right into the recovery menu of the installer. Format the disk if needed, and **install the new version** as usual. - Once everything is done, download the GUI again and use ***Build and Install OpenCore*** on the computer's drive. - Boot again without USB, and choose the OCLP icon while pressing `Ctrl` to **set as the default option**.