How to Repair Hard Disks with fsck on macOS

Running fsck from Single User Mode

1. Restart your computer.
2. Hold down “Command + S” while your computer restarts. ...
3. Some white text will scroll by quickly. ...
4. To repair the boot disk, type in the following command, then press “Enter.” ...
5. You can also use fsck to repair non-boot disks, but you'll need to know the filesystem type.

1. How do I fix a corrupted hard drive Mac?
2. How do I run fsck manually on Mac?
3. How do I fix disk and file system problems on my Mac?
4. How do I run fsck on an external hard drive Mac?
5. Can you fix a corrupted hard drive?
6. How do you know if your hard drive is corrupted?
7. How do I fix smart errors on my Mac?
8. How do you fix a Mac error?
9. How do you fix a startup disk on a Mac?
10. How do I boot my Mac into recovery mode?
11. How do you clear disk space on a Mac?
12. How do I remove Macintosh HD from Disk Utility?

How do I fix a corrupted hard drive Mac?

Repair Mac Hard Drive by Using First Aid in Disk Utility

Disk Utility is a free macOS application that can help you resolve Mac hard drive problems. When your startup disk is corrupt, your Mac won't boot. In that case, you need to launch Disk Utility in macOS Recovery mode and repair the disk.

How do I run fsck manually on Mac?

Single User mode doesn't attempt to boot macOS; it only provides access to a Unix command line. To boot into Single User mode: Turn your computer off, then press and hold Cmd + S when your computer boots. You'll soon see a command line prompt. You can type fsck -fy to run fsck.

How do I fix disk and file system problems on my Mac?

Press and hold the “Command+R” keys while it's booting. You'll see a progress bar appear, and you can release the keys after you do. Your Mac will load straight into recovery mode. (If recovery mode doesn't appear, restart your Mac and try pressing the keys again.)

How do I run fsck on an external hard drive Mac?

2. Use FSCK Command in Single-User Mode to Fix External Drive

1. Start or restart your Mac then promptly press and hold Command + S keys.
2. Release the keys once you see white text. ...
3. On the prompt, type fsck_hfs –y /dev/disk4s1 and hit Return.
4. Check the message provided by the fsck command.

Can you fix a corrupted hard drive?

Summary: Hard drive corruption occurs due to file system errors that turn a hard drive RAW. ... To repair a corrupt hard disk, you can format it, which is the simplest way to repair a corrupt drive. But, it causes permanent data loss. However, you can recover your lost data with the help of Stellar Data Recovery software.

How do you know if your hard drive is corrupted?

Warning Signs For Impending Hard Drive Failure

1. Strange noises such as clicking or humming from the drive.
2. Repeated program crashes or disk errors.
3. Frequent error messages while running software.
4. Overall strange behavior from the computer.

How do I fix smart errors on my Mac?

Restart your Mac, immediately press-hold the Command + R keys, when the Apple logo appears, release. Now, on the macOS Utilities window, choose Disk Utility, then press Continue. From the left pane, now select the startup disk, and then click First Aid. Click Run to repair the startup disk.

How do you fix a Mac error?

How To Fix Common Mac Problems

1. Reboot Mac.
2. Reset PRAM/NVRAM.
3. Boot into Safe Mode.
4. Reset SMC.
5. Repair disk permissions.
6. Verify disk (and repair if necessary)
7. Reset Safari and clear caches.
8. Delete Caches folders.

How do you fix a startup disk on a Mac?

Restart your Mac, and press Command + R, while it's restarting. Select Disk Utility from the macOS Utilities menu. Once Disk Utility has loaded, choose the disk you wish to repair - the default name for your system partition is generally "Macintosh HD", and choose 'Repair Disk'.

How do I boot my Mac into recovery mode?

How to start Mac in Recovery Mode

1. Click on Apple logo at the top left of the screen.
2. Select Restart.
3. Immediately hold down the Command and R keys until you see an Apple logo or spinning globe. ...
4. Eventually your Mac will show the Recovery Mode Utilities window with the following options:

How do you clear disk space on a Mac?

How to free up storage space manually

1. Music, movies, and other media can use a lot of storage space. ...
2. Delete other files that you no longer need by moving them to the Trash, then emptying the Trash. ...
3. Move files to an external storage device.
4. Compress files.

How do I remove Macintosh HD from Disk Utility?

How to Wipe a Mac Hard Disk Drive (HDD)

1. Make sure your Mac is turned off.
2. Press the power button.
3. Immediately hold down the command and R keys.
4. Wait until the Apple logo appears.
5. Select “Disk Utility” from the OS X Utilities list. ...
6. Select the disk you'd like to erase by clicking on it in the sidebar.