You should be able to DFU, but when it phones home it'll require a software upgrade
replyApple recently had an issue with expired certs they had to remedy. That tends to be their bottleneck now.
replyYeah that just tripped me up trying to recomission a 2012 Macbook Pro.
replyCouldn't connect to wifi except through a password-less hotspot. Then I couldnt get online because nothing with SSL was working.
I didnt have a pen drive so I had to FTP off another machine, via my phone hotspot. We got there though!