I wanted to install High Sierra and made a USB Installation Disk with Disk Maker X
All goes well and the installation is doing fine.
Then this screen appears:
OSX couldn't install on this computer. To enter the Apple Diagnostic program to test your hardware please hit
SO that's what I did.
D during reboot does exactly nothing but instead it goes to this screen:
And from this screen it then goes back to the former error.
And that's it. Nothing else is happening.
I can enter the Disk Utility when the error is appearing. But I can't Partition the HD nor delete it because it is used by another process.
Nice. Now what?