

Tried it on the iMac and on the Macbook Pro. I left it there for over 2 hours, and nothing happens. The installer boots up just fine, but gets stuck halfway (not frozen, because when typing CMD-L, it says installation in progress).

I've tried with 2 USB keys, one USB2 with 8Gb which I used to create the installer, and the other USB3 128Gb key to install High Sierra on. I also have a mid 2015 15 inch Macbook Pro, which had Yosemite as the original OS. My iMac is a mid 2017 27 inch model, came with High Sierra installed.
