I just reinstalled MAC OS High Sierra from recovery mode on my Macbook Pro 2011 but after installation has finished I tried to go in single user mode with CMD + S but I can't get the ROOT ? What I forgot or did wrong, I don't know since there is not a lot of options to do so...
Hello,
You can boot into Recovery Mode (Command + R) or Internet Recovery Mode (Command + Option + R) and launch the Terminal app from the Utilities menu. This will give you root access, but you will need to keep in mind that the internal drive volumes are mounted at other locations than "/" if you want to modify any local files. macOS may prevent modifications to the system boot volume unless SIP (System Integrity Protection) is temporarily disabled.
Don't get ROOT after CMD + S....
