Is T2 chip installed Mac became impossible to restore with using
Mac disk image not equipped with T2 chip? When I restored in
September 2018 and in March 2019, macOS had worked normally but
when I restored in September 2019, only spinning globe had been
displayed all the time and macOS utility by command + R couldn't launch.
While the spinning globe is displayed on the screen, I could confirm
that there is response of HTTP/1.1 200 OK from http://osrecovery.apple.com/
by conducting packet capture.
I assume that there was specification change by the recent update.
