I'm on a 2015 model too.
My method means you don't need to turn off the rootless thing. You can't edit the file in place, so if you drag it to the desktop it makes a copy of the file. You then reboot into recovery mode, open Terminal and move the file from the desktop to the right place. I mean you could turn off rootless make the mod and then turn it back on again. My method just means one less step after the mod.
My method means you don't need to turn off the rootless thing. You can't edit the file in place, so if you drag it to the desktop it makes a copy of the file. You then reboot into recovery mode, open Terminal and move the file from the desktop to the right place. I mean you could turn off rootless make the mod and then turn it back on again. My method just means one less step after the mod.