Comment by tombert

I didn't have a Mac in that era, but I did have a Macbook Air from 2014 and I ran Ubuntu and NixOS on it just fine, even at the time. I had to use rEFInd but it wasn't terribly hard.

On modern Macs, it's pretty easy to install Linux with Avahi.

To be clear, I don't necessarily need it to be easy to put another OS on there. I just want it to be possible. As far as I'm aware, there's no way (officially or unofficially) to install another OS on any recent iPhones. Someone might eventually figure out how to break the bootloader on the iPhone 13, but I personally think it should be something that the owner of the phone is allowed to opt into.