원문 게시자: Joseph Hughes ,
Hello Uas! Just the other day I was fighting with this same problem... I installed Sierra fine on 2 computers before, but then it just stopped working with this error. It ended up being the installer was corrupt some how after downloading and installing a few times... I plugged my MBP into a lan for good internet, deleted my existing Sierra installer and downloaded a new copy. Remade my installer thumbdrive and it worked perfectly after that! Give that a try (again) and let us know if that worked for you! Good luck!