Hey ! Currently in the proces of experimenting with HFS+ and APFS for my bootable drive with High Sierra. I have looked at numerous guides like this: https://malcont.net/2017/09/how-to-...sierra-without-filesystem-change-hfs-to-apfs/ I want to make a fresh install of High Sierra without having to do the "cloning" proces. At the moment my two Samsung EVO 850's are connected by the regular SATA ports. Thought it would be smart to make one of the discs my "High Sierra installer disc" for fast install speed instead of a USB drive. If the drive I want to install High Sierra on is called "HD50" shouldn't it be possible to install High Sierra from the terminal when booting up with the following line?: "/Volumes/Install macOS High Sierra.app/Contents/Resources/startosinstall" --volume /Volumes/HD50 --converttoapfs NO I really want this to work in some way since the "cloning" method and installing old OS X (upgrading to High Sierra and running terminal from desktop) aren't optimal solutions in my eyes... Thanks in advance!