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Origineel bericht door: 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!