There are no disk / partition errors when running verify / repair. I checked if there's a recovery partition, and there is a Apple_Boot partition but without the usual name ("Recovery HD"). Note: I already checked the system date, which is current. The installation takes about 5 minutes and in the very last second I receive an error message "An error occurred while preparing the installation. This just circumvents placing the files into the Trash, it deletes the file (s) immediately from the Mac. Confirm with the dialog that you wish to delete the files permanently and immediately.
PERMANENT ERASER FOR MAC SIERRA FOR MAC
If you are going to shred data under macOS 10.13 High Sierra, Super Eraser for Mac is a good choice. The erased data will be permanently lost. Mode 1: selectively erase files/folders Mode 2: wipe entire hard drive Mode 3: Wipe free disk space. It offers three modes to help in permanently erasing data. When booting the iMac and pressing the option key, I am presented this USB drive as startup option, and when I select it I end up in the recovery mode window again with the option to reinstall High Sierra. I then went on and selected reinstall MacOS High Sierra in the recovery mode, which failed a couple of times (no progress for hours) and after several tries it showed Mountain Lion (instead of High Sierra before) as the OS to be installed. Select the file (s) or folder (s) you wish to instantly and permanently delete and hit the following keystroke sequence: Option + Command + Delete. Super Eraser for Mac is a powerful Mac data erasure application. Then, I created a USB bootable installer for High Sierra.
Try changing some files (ist), but no luck. I created a bootable USB With Unibeast 7.0.2 and 6.2.0 (El capitan & Sierra). I tried this as well, but the installation process froze after about 7 hours with "3 hour remaining". I would like to install MacOS Sierra on Asus G752VS. I then went on and selected reinstall MacOS High Sierra in the recovery mode, which failed a couple of times (no progress for hours) and after several tries it showed Mountain Lion (instead of High Sierra before) as the OS to be installed. Using the Disk Utilities in Recovery Mode, I erased all data on the Macintosh HD partition. I have a late 2012 iMac i7 16GB RAM and 1TB FusionDrive which I want to sell.