How to repair a Mac disk with Disk Utility
- Open Disk Utility. Start up from macOS Recovery, then select Disk Utility from the Utilities window. Click Continue. ...
- Locate your disk in Disk Utility. Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility. ...
- Repair volumes, then containers, then disks. For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab.
Full Answer
How to repair your Mac using Disk Utility?
- Restart Mac by clicking on the Apple menu then Restart.
- Upon restarting press Command + R and holding until the Apple logo appears.
- Click on Disk Utility and click Continue.
- Find the disk from the sidebar that needs to be repaired.
- Look for First Aid and click. ...
- Simply backup the entire Mac and bring it to the nearest Apple store.
How do you repair a hard drive on a Mac?
In that case, follow these steps:
- Shut down your Mac, then unplug all nonessential devices from your Mac.
- If you're repairing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. ...
- If your disk still doesn't appear in Disk Utility, your Mac might need service. If you need help, please contact Apple Support.
Does Mac have a Disk Cleanup?
Understanding What “Your Disk is Almost Full” Means
- Clear system storage on Mac. System storage cleanup sounds like a serious undertaking. ...
- Clean up cache files on your Mac. Cache files are files that help your Mac run programs a bit more smoothly. ...
- Get rid of localization files. ...
- Delete duplicate files. ...
- Remove old iOS backups. ...
- Remove large and old files. ...
- Remove unnecessary applications. ...
How, when, and why to Repair Disk Permissions on your Mac?
[Solution] How to Repair Permissions on Mac
- Press Command + Space to open Spotlight, type in "Disk Utility", and hit Enter.
- Select Macintosh HD from the left sidebar menu.
- Click on the First Aid tab.
- Click on Verify Disk Permissions. By taking this step, Disk Utility will work through your hard drive to detect broken or misbehaving ...
- Click on Repair Disk Permissions and wait while Disk Utility runs through the identified permissions to fix them. If disk permission issues ...
How do you fix a corrupted disk on a Mac?
How to Fix a Corrupted Hard Drive on a MacRepair the Corrupted Hard Drive Using Disk Utility. ... Initiate the FSCK Command. ... Try Free Software to Recover Mac Hard Drive Data. ... Recover from a Time Machine backup drive. ... Hire a hard drive recovery service for Mac. ... 🔌 Shut Down Your Mac Safely. ... ⚡ Prevent Spills and Exposure.More items...•
What does it mean to repair disk on Mac?
Disk Utility can check for and fix errors related to the formatting and directory structure of a Mac storage device. Disk Utility can fix certain disk problems—for example, multiple apps quit unexpectedly, a file is corrupted, an external device doesn't work properly, or your computer won't start up.
How do I restore a disk on a Mac?
Restore a disk using Disk Utility on MacIn the Disk Utility app on your Mac, choose View > Show All Devices. ... In the sidebar, select the volume you want to restore, then click the Restore button . ... Click the Restore pop-up menu, then choose the volume you want to copy.Click Restore, then click Done.
How do I repair my disk?
Non-System VolumePress "Windows-E" from the desktop to open File Manager. ... Select "Properties" from the context menu, click the "Tools" tab and then click the "Check" button under Error Checking.Click "Repair This Drive" when the scan completes to fix the device errors.
Does repair disk on Mac erase data?
No. Disk Utility First Aid only checks and repairs the errors related to a Mac disk's file system format and directory structure. It cannot erase data on the drive.
Does repair disk delete files Mac?
It has no effect except on the drive it is repairing. Repairing only affects the directory and filesystem. If a directory is corrupted and repaired then it's possible a file or two may be lost on the drive in question. But Disk Utility does not delete files except when you erase a drive.
How do I reinstall my Mac startup disk?
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'.
What if there is no startup disk on my Mac?
What to do if you accidentally delete your startup disk. If you somehow managed to delete your startup disk, you will need to reinstall macOS after restarting in Recovery mode. If you deleted the Recovery partition, your Mac would use Internet Recovery to reinstall. You will need to be connected to the Internet.
How do I reinstall Mac HD disk?
Restart your Mac. Choose Apple menu > Shut Down, press and hold the power button until “Loading startup options” appears, select Options, click Continue, then follow the onscreen instructions. In the Recovery app window, select Reinstall for your macOS release, click Continue, then follow the onscreen instructions.
How do I fix an unreadable hard drive?
5+ Fixes for "The Disk Structure Is Corrupted and Unreadable" Error#1. Unplug and Re-plug the Corrupted/Unreadable Device.#2. Check and Repair Disk Error via CHKDSK.#3. Reinstall Disk Drivers.#4. Format Drive.#5. Recover Data.
Why is my disk not working?
If your new hard disk is not detected by or Disk Manager, it could be because of a driver issue, connection issue, or faulty BIOS settings. These can be fixed. Connection issues can be from a faulty USB port or a damaged cable. Incorrect BIOS settings may cause the new hard drive to be disabled.
How do I fix a failed hard drive?
How to Fix Hard Drive FailureClean Out the Computer Vents. Over time, dust and debris will visibly clog up the vents on your computer. ... Check the Power and Data Cables. Your hard drive has power and data cables that connect to it from the computer power supply and motherboard. ... Check Your Bios. ... Listen for Sounds.
How do I free up my Mac startup disk?
How to free up space on your Mac startup diskEmpty the Trash and Downloads folder. ... Get rid of Time Machine snapshots. ... Delete old iOS and iPadOS backups. ... Uninstall apps you don't use anymore. ... Upload or export your largest files. ... Find and remove duplicate files. ... Clean up unnecessary system files.
How do I get my Mac out of recovery mode?
How to Get Out of Recovery ModeRestart Your Mac.Create a New User Account.Reset Your PRAM and NVRAM.Reset the System Management Controller.Erase and Install OS X.
When I turn a question mark on my Mac?
A folder with a flashing question mark means that your startup disk is no longer available or doesn't contain a working Mac operating system.
What does First Aid do on Mac Disk Utility?
Use the First Aid feature of Disk Utility to find and repair disk errors. Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely.
How to repair a Mac OS X drive?
In OS X Recovery, click the “Disk Utility” shortcut to launch the Disk Utility here. Select the drive or partition you need to repair and click the “First Aid” button. The Disk Utility interface is the same one you’ll see on your Mac OS X desktop, but run it from here and it’ll be able to repair problems with your system drive.
How to check disk for errors on Mac?
It depends which you select in the sidebar. Click “Run” and your Mac will check the disk you selected for errors. If it finds any errors, it will attempt to automatically fix them for you. You can click the “Show Details” drop-down message to view detailed information about any errors it encounters.
How to check if a disk is Macintosh HD?
In the Disk Utility application, select the disk or partition you want to check — the system partition is named “Macintosh HD” by default — and click the “First Aid” button. You can either run the First Aid function on an entire disk, or an individual partition on that disk. It depends which you select in the sidebar.
How to fix Mac error?
One simple way to fix such errors is to boot your Mac into Safe Mode. Safe Mode, sometimes called “Safe Boot,” contains an automatic startup check and repair that can fix these problems.
How to check disk partition?
To launch it, you can press Command+Space to open Spotlight search, type “Disk Utili ty”, and press Enter. Or, you can navigate to your Applications folder, double-click the “Utilities” folder, and double-click the “Disk Utility” shortcut. In the Disk Utility application, select the disk or partition you want to check — the system partition is named ...
How to get Mac to boot up in single user mode?
To do this, start your Mac in single-user mode. Restart it, and then press and hold the Command+S keys while it boots.
How to get Mac into recovery mode?
To do this, restart your 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.)
What to do if Disk Utility can't repair your disk?
If Disk Utility can’t repair your disk, or you receive a report that the First Aid process failed, try to repair the disk or partition again. If that doesn’t work, back up as much of your data as possible, reformat the disk, reinstall macOS, then restore your backed-up data.
What happens if my Mac is not repaired?
If you continue to have problems with your disk or it can’t be repaired, it may be physically damaged and need to be replaced. For information about servicing your Mac, see Find out how to service or repair your Mac.
How to check if a disk is failing?
To check and repair a disk, you need to run First Aid on each volume and container on the storage device in turn, then run it on the storage device itself. If Disk Utility tells you the disk is about to fail, back up your data and replace the disk—you can’t repair it.
How to show all devices on Mac?
In the Disk Utility app on your Mac, choose View > Show All Devices.
What is disk utility?
Disk Utility can check for and fix errors related to the formatting and directory structure of a Mac storage device.
How to repair an external drive on Mac?
If you're repairing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good . Then turn the drive off and back on. If your disk still doesn't appear in Disk Utility, your Mac might need service. If you need help, please contact Apple Support. Published Date: November 17, 2020.
How to repair a Mac that won't start up?
However, if your Mac doesn't start up all the way, or you want to repair the disk your Mac starts up from, open Disk Utility from macOS Recovery: Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps: Apple silicon : Turn on your Mac and continue to press and hold the power button until you see ...
How to repair disk if there is no run button?
If there is no Run button, click the Repair Disk button instead. If the button is dimmed and you can't click it, skip this step for the disk, container, or volume you selected. If you're asked for a password to unlock the disk, enter your administrator password. After Disk Utility is done checking the volume, select the next item above it in ...
What to do if disk utility found errors that it can't repair?
If Disk Utility found errors that it can't repair. If Disk Utility found errors that it could not repair, use Disk Utility to erase (format) your disk.
How to open disk utility on Mac?
In general, you can just open Disk Utility from the Utilities folder of your Applications folder. However, if your Mac doesn't start up all the way, or you want to repair the disk your Mac starts up from, open Disk Utility from macOS Recovery: 1 Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:#N#Apple silicon : Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.#N#Intel processor: Turn on your Mac, then immediately press and hold these two keys until you see an Apple logo or other image: Command (⌘) and R. 2 You may be asked to select a user you know the password for. Select the user, then click Next and enter their administrator password. 3 From the utilities window in macOS Recovery, select Disk Utility and click Continue.
Access Disk Utility from macOS desktop
To access the Disk Utility from the macOS desktop, follow these steps.
Access Disk Utility from boot menu
If you cannot get to the macOS desktop, you will have to access the Disk Utility from the boot menu.
Repair disk in macOS
Now that you have the Disk Utility open, you can start repairing a disk.
How to fix disk error on Mac?
Step 3: Run First Aid to check and repair disk errors. 1. Click the First Aid on the top menu and tap on Run button to launch First Aid on Mac. 2. Continue while you get a prompting message from First Aid. 3.
How to restart Mac from hard drive?
Enter the command " reboot " and press Return key again. Then your Mac will restart normally from hard drive.
What does it mean when a disk is not fully repaired?
It means the disk has not been fully repaired. You need to run Disk Utility again and try to repair the damaged disk. If it cannot be done, make a backup of your data and then reformat the disk, and reinstall macOS. Or if the errors cannot be repaired because of physical damage, you will need to replace the old damaged disk.
Why won't my Mac boot?
Undoubtedly, there are lots of reasons that can lead to failed Mac boot. And hard disk error is one of them. So it is urgent to check out the disk errors and repair them in time while you encounter this problem. Otherwise, not only you cannot boot Mac, but also you will lose many important files or folder on Mac.
Where is the startup disk on Mac?
In the left pane, there lists the Mac startup disk and other connected drives. Just click the corrupted or damaged disk from the left pane, or any other drives you want to repair.
Does Mac have built in utilities?
Fortunately, two built-in utilities have been created in Mac for the problem.
Can you use Disk Utility in recovery mode?
Note: Besides disk repair, you could also use Disk Utility in OS X recovery mode to wipe, or restore or partition disk.
How to boot Mac in recovery mode?
To boot in Recovery Mode, restart your Mac and hold down Command-R. Go to Applications > Utilities and double-click Disk Utility to launch it. In the top left corner of the window, click View and choose View all devices. In the sidebar, select a disk or volume. Click First Aid. Press Run then Continue .
What is the maintenance app for Mac?
The Mac maintenance app, CleanMyMac X , has a number of tools that may perform intensive care on your drive. Tools that may help you in this case:
What is Disk Utility?
Disk Utility is macOS built-in disk erasing, formatting, and repair tool. It’s very useful, not just for checking and repairing problems, but for reformatting disks, securely erasing data and mounting a volume that the Finder is having trouble mounting. It lives in the Utilities folder in Applications.
Who developed CleanMyMac X?
As a first step, get a download of CleanMyMac X — this software was developed by MacPaw and is notarized by Apple.
Does CleanMyMac X keep your data?
That way, if it fails, you won’t lose your data. CleanMyMac X has a number of tools that can keep your disk running smoothly and reduce the chance of problems occurring. Running its maintenance module regularly should keep your disk running well.
Can disk utility fix everything?
macOS Disk Utility is very good at repairing some disk problems – usually the earlier you detect a problem and try and repair it, the better. However, it can’t fix everything. So the first thing you should do if Disk Utility can’t repair a disk is to back it up. That way, if it fails, you won’t lose your data.
What is disk drill for Mac?
Software tools like Disk Drill for Mac are useful when First Aid and Time Machine won’t work or are unavailable. You can also use third-party free tools to get the results you want.
How to Prevent Hard Drive Corruption on macOS?
The best way to prevent a “macOS recover files from a corrupted drive” problem is to monitor your system’s health frequently.
How to recover information from a corrupted hard drive?
1. Repair the Corrupted Hard Drive Using Disk Utility. After discovering the corrupted hard drive, you can repair it through the Terminal. Once you open it, type in this command:
What to do if your hard drive is corrupted?
If you fail to fix your corrupted hard drive at home, you can always hire a hard drive recovery service and let experienced professionals with state-of-the-art equipment recover your data for you. Professional data recovery services are often more costly than products like Disk Drill, but they can help you get to the missing data when other methods don’t work.
Why does my heart beat so fast on my Mac?
A corrupted hard drive on a Mac can cause your heart to start racing fast. You might wonder:
How to turn off Mac for the day?
When it is time to turn your Mac off for the day, go to the Apple menu at the top left to initiate the command. If you need the computer to sleep, you’ll find that option available in the same location.
Why does my Mac start acting strange?
Your Mac starts acting strange when you have a corrupt hard drive. The symptoms might seem random at first, but you’ll see problems continue to increase.
