I have a MacBook Pro (2013) running Sierra on the internal SSD. I’ve installed Debian12 onto an SD card. Upon boot (by holding down the Alt key) it doesn’t show an option of EFI Boot. But having flashed rEFIND-cd onto a USB, and once I plug it in, the Debian system on the SD card shows up and I am able to boot into it no problem.
So what I want to do is install rEFInd onto that SD.
Upon selecting to install rEFInd in Synaptic, I get a prompt asking : ” Configuring rEFIND - Automatically install rEFInd to the ESP?”
I'm a bit hesitant on this and having searched the web I haven’t found a concrete answer… This thread sort of answers half of my question, but I'm still not exactly sure… What is the difference between HFS+ and EFI System Partition (ESP)?
My question is because I'm running Sierra on the internal SSD which has an EFI partition, if I choose to install rEFInd on to the ESP, will it not mess up the Mac OS EFI? Will it just install to the SD card Linux OS?