I was gifted a few 2007 clam shell Macbooks to try to repurpose them. I decided to install Linux Mint and use one as a Minecraft server for my daughter, who loves minecraft. I inserted the Mint iso cd and after typing the EFI password the install went like normal. When I got to the screen where to choose the installation type I chose to Erase disk and install Linux. A worming came up saying no EFI Boot partition was detected and that I had to continue at my own risk. The installation continued and rebooted; removed disk and all I got was the file folder with a question mark on it. What did I do wrong and how can I correct this?