Warning: This article is about trying to accomplish some things in Mac single-user mode when your system is in trouble. In this article I assume that you're an experienced Unix administrator, so I don't bother to explain each command. If you don't know what the commands in this article do, don't use them, just take your Mac to an Apple store or Mac dealer. Be careful with all of these steps.
By Alvin Alexander. Last updated: May 12 2017