Type the following command in the Single User Mode window: /sbin/fsck -fy Once you've entered Mac Single User Mode successfully, you can use the Mac Single User Mode command to repair your hard disk that Disk Utility First Aid or Mac Safe Mode failed to fix. How to repair a hard disk via Mac Single User Mode? Note: If you use FileVault disk encryption or a Mac firmware password, then you will need to turn off the FileVault password as well as firmware password before you can load Single User Mode. But please be noted that if you are running an Intel-based Mac with an Apple T2 Security Chip, you need to change Full Security to No Security in Startup Security Utility under Mac Recovery Mode first. Here is how to enter Single User Mode as your Mac boots up. How to boot into Single User Mode on Mac?
Keep reading to learn how to use Single User Mode on Mac including running the fsck command to repair the disk in it. The most frequently used command in Mac Single User Mode is fsck (file system consistency check or file system check), which enables you to check macOS file systems consistency and repair your hard disk. There are quite a few Unix commands available in this minimal environment to allow you to perform basic repairs to the startup drive, mount the storage drives as well as read and write files. You'll only have access to a Unix prompt, into which you'll need to type commands. It will boot your Mac into a minimal text-based environment with no graphical interface and no drive volumes mounted on startup. Single User Mode is known as one of the special booting modes on Mac to troubleshoot Mac problems and perform administrative tasks. Can you exit the Single User Mode on Mac?
Thus it is still necessary and beneficial for you to know how to use Mac Single User Mode and repair your hard disk. Though Mac Single User Mode is no longer available on the M1 Macs, it still works efficiently on the Intel-based Macs. If you need to repair your Mac hard drive or fix Mac white screen issue, you can boot your MacBook into Single User Mode.
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