Repairing Guides

how to use disk utility to repair mac

by Mr. Quinn Kessler V Published 2 years ago Updated 1 year ago
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How to see My Disk Utility on My Mac

  1. Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility.
  2. The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. And beneath each disk you...

Full Answer

How to access disk utility on Mac OS?

  • 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 ...
  • You may be asked to select a user you know the password for. ...
  • From the utilities window in macOS Recovery, select Disk Utility and click Continue.

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.

How do you check disk utility?

[Partition Magic]

  • Method 1. Run Check Disk Windows 10 from Partition Property. ...
  • Method 2. CHKDSK Windows 10 with Elevated Command Prompt. ...
  • Method 3. Windows 10 CHKDSK Repair with Third-party Software. ...
  • Method 4.Run Check Disk Windows 10 from Installation Disc/USB drive. The above three methods show you how to run CHKDSK when your computer can boot up successfully. ...

How, when, and why to Repair Disk Permissions on your Mac?

[Solution] How to Repair Permissions on Mac

  1. Press Command + Space to open Spotlight, type in "Disk Utility", and hit Enter.
  2. Select Macintosh HD from the left sidebar menu.
  3. Click on the First Aid tab.
  4. Click on Verify Disk Permissions. By taking this step, Disk Utility will work through your hard drive to detect broken or misbehaving ...
  5. Click on Repair Disk Permissions and wait while Disk Utility runs through the identified permissions to fix them. If disk permission issues ...
See More....

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How do I restore my Mac using Disk Utility?

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 fix a corrupted Mac disk?

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...•

How do I run Mac in repair mode?

Hold down Option/Alt-Command-R or Shift-Option/Alt-Command-R to force your Mac to boot into macOS Recovery Mode over the internet. This should boot the Mac into Recovery Mode.

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.

Can you fix a corrupt hard drive?

You can fix a corrupted hard drive by running the CHKDSK command in Command Prompt. Caution: The CHKDSK command known for scanning and repairing drive, allow to use /f and /r attributes to fix the corruption in the hard disk.

How do you restore a Mac to factory settings?

How to Factory Reset a Mac or MacBook (macOS Monterey)Click the Apple icon in the menu bar (top-left corner).Select System Preferences from the drop-down menu.Select 'Erase All Contents and Settings. 'Enter your password, select 'OK. 'Select the 'Erase All Content & Settings' button.

How do I boot into recovery mode?

Press and hold down the Volume Down button and keep holding it, then press and hold the Power button as well for a few seconds, and let go when you see the Android mascot on its back on screen.Use the Volume Down button to cycle through the options until you find Recovery mode and press the Power button to load it.More items...•

How do I restore my Mac in recovery mode?

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 uncorrupt a file on Mac?

How to Open and Repair a Corrupted Word File on MacLaunch the Word on Mac. In the main menu, click on "File" > "Open".Find the drop-down menu titled Enable( Show). Select the option "Recover Text from Any File".Navigate to your corrupted Word file. Follow on-screen instructions to complete the recovery process.

How do I know if my Mac hard drive is corrupted?

Signs of a Corrupted External Hard Drive📄 Your Mac can't read files from it.💽 Your Mac doesn't recognize the hard drive.🔒 An error message like “The disk you inserted is not readable” appears.

What does corrupt image mean on Mac?

The data in a disk image can be corrupted if a problem occurs while it's being copied or if someone modifies it. You can see whether a disk image's data has been corrupted by verifying its checksum, which is a calculation of all of its data.

What causes a Mac hard drive to fail?

Electrical damage – Power surges or the discharge of static electricity can cause a drive failure. Moisture or humidity – Exposing an HDD or SSD to extremely high humidity or moisture can destroy the drive. Excessive heat – Heat can cause your drive to fail.

What is Command+R on Mac?

Command+R is a keyboard shortcut for Mac. It allows you to enter the Mac Recovery Mode when your Mac won’t turn on or for some other reason.

How do I force a Mac to start?

If your Mac fails to boot, you can press Shift+Control+Option and the Power button at the same time. Then release these four buttons at the same ti...

What does First Aid do on Mac Disk Utility?

First Aid can be used to verify and repair some directory structures issue on your HFS or HFS+ hard disks or volumes. This article shows you how to...

What do I do if First Aid fails on Mac?

If First Aid fails to repair your disk, you can try it again. If the issue persists, you should first back up the data on that disk if possible and...

How to repair a Mac that won't start up?

However, if your Mac doesn't start up completely 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 ...

What is disk utility?

Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Errors can lead to unexpected behaviour when you're using your Mac, and significant errors may even prevent your Mac from starting up completely.

What to do if there is no Run button?

If there is no Run button, click the Repair Disk button instead.

What to do if Disk Utility can't see your disk?

If Disk Utility can't see your disk, it also can't see any containers or volumes on that disk. In this case, follow these steps: Shut down your Mac, then unplug all non-essential devices from your Mac. If you're repairing an external drive, make sure it's connected directly to your Mac using a cable that you know is working correctly.

How to enter administrator password on Mac?

You may be asked to select a user you know the password for. Select the user, then click Next and enter their administrator password.

How many volumes does an Apple HDD have?

In this example, the startup disk (APPLE HDD) has one container and two volumes (Macintosh HD, Macintosh HD - Data). Your disk may not have a container and it may have a different number of volumes.

What is the order of repair in Macintosh?

The order of repair in this example was Macintosh HD - Data, then Macintosh HD, then Container disk4 and then APPLE SSD.

What Is Disk Utility on Mac?

Disk Utility is a hard disk management tool that comes with your Mac operating system. It can be used for disk partition and disk volume-related tasks on your Mac computer.

How to Partition Drives and Format Partitions on Mac?

But you can’t see the empty hard drives by default. You need to go to Views > Show All Devices to make Disk Utility show a tree of drives and the internal partitions.

How to Wipe a Partition or a Drive on Mac?

The Erase feature in Disk Utility allows you to securely erase all data on a disk or a partition. You can even only erase the free space using it.

How to Create and Restore a Disk Image on Mac?

Go to Finder > Applications > Utilities > Disk Utility. You can also use other methods mentioned in this post to open Disk Utility on Mac.

How to Set up RAID Disk Sets on Mac?

You can also use Disk Utility to set up RAID on your Mac. The operations are very simple:

What If You Lose Some Important Files when Using Disk Utility on Mac?

As mentioned above, some operations in Disk Utility can destroy files on the targeted drive. If your operation is wrong, you will lose your data unexpectedly. As long as the missing files are not overwritten by new items, you can use Stellar Data Recovery for Mac to get them back.

How to open disk utility?

Way 1: Open Disk Utility via Spotlight Search. Press Command+Space on your keyboard or click the Spotlight icon in the upper-right corner of the top menu bar to open Spotlight search. Type Disk Utility into the search box. Double-click Disk Utility - Utilities from the search results to open it.

Let macOS manage space between multiple volumes

With Apple File System (APFS), the file system introduced in macOS 10.13, you can easily add and delete volumes on your storage devices. APFS-formatted volumes automatically grow and shrink—you never have to repartition a storage device again.

Keep your external storage devices secure

When you get a new flash drive or other storage device, format it as APFS and encrypt it with a password to protect its contents.

Give your disk a checkup

If you’re having problems with a disk, Disk Utility can check the disk and repair problems it detects.

Part 2. How to Use Disk Utility?

Now that we know that a disk utility is vital in making sure that Mac is running smoothly, there are also a lot of potential problems that can arise and cause a stir. There are a lot of reasons where you can use disk utility on Mac.

Part 3. How to Repair Disk on Mac using Disk Utility?

Just like we mentioned above, there are a lot of things your disk utility on Mac can do. For example, if the disk has problems and it is no longer letting you do anything on your device, you can scan and diagnose to understand the issue.

Part 4. How to Optimize and Boost Disk on Mac?

In order to keep your disk healthy and well-performing, always ensure that you have a clean drive instead of a full disk. You can set a maintenance schedule to regularly clean up the drive or better yet use iMyMac PowerMyMac.

Part 5. Conclusion

We have finally learned about what disk utility on Mac does, how to use it, and even how to repair disks using disk utility.

How to repair a Mac disk?

At its essence, Mac disk repair is as simple as opening the Disk Utility application, selecting a disk, and running First Aid. But before you jump in, there are a few other steps you need to take to protect yourself from data loss.

What is disk utility?

Disk Utility comes pre-installed on every Mac, and offers a way to manage and repair the various disks you might use: startup disks, storage volumes, and even external drives. You can use Disk Utility to partition, restore, or format different disks.

What does a green check mean in First Aid?

When the First Aid process is finished, you’ll see a report telling you if it was successful or not. Most of the time, you’ll see a big green check and you’ll know the repair went well. But on occasion, First Aid might spit out a list of unfixable errors with your Mac disk instead.

How to repair a Mac hard drive?

To repair your hard drive with Disk Utility, first, you need to restart your Mac. Just click the Apple logo in the top left corner of your screen and select Restart.

Why is my Mac not working?

It’s entirely possible that you’re experiencing problems with your Mac because of a physical problem with its disk. This might be the result of liquid damage or a hard knock, but disks can also stop working as they age over time.

How to tell if my Mac is Intel or Silicon?

To check this, open the Apple menu in the top-left corner of the screen and select About This Mac. Beneath your Mac model name in the window that appears, it should say either Chip (for Apple Silicon models) or Processor (for Intel models).

Can MacKeeper fix disk problems?

We already explained how MacKeeper can fix other issues that look like disk problems, but if that doesn’t help, there are other third-party apps you can use to repair your disk if Disk Utility fails you.

What is Disk Utility on Mac?

The Disk Utility on Mac is a helpful tool that finds and repairs disk errors on Mac computers. Using the Disk Utility on Mac is often suggested when the user is experiencing unusual problems such as the Mac not being able to boot properly.

What to do if disk doesn't show up on Mac?

What to do if the disk you are trying to repair doesn’t show up in the Disk Utility on Mac. If you cannot see the disk you want to repair of your Mac in the left panel of the Disk Utility interface, then turn off the computer, disconnect all peripheral devices and try again.

What does it mean when a Mac is labeled as a chip?

If you see an entry labeled “Chip” with the chip model written next to it, this means your Mac is with an Apple Silicon processing unit. If, instead of “Chip”, there’s a “Processor” entry followed by the name of the processor, then this means that the computer is equipped with an Intel CPU.

How to create a DMG file?

Click the File menu in Disk Utility and use the New menu to create blank disk images or disk images containing the contents of a folder — these are .DMG files. You can then mount that disk image file and write files into it. This is particularly useful because you can encrypt that DMG file, creating an encrypted container file that can store other files. You can then upload this encrypted DMG file to cloud storage locations or save it on unencrypted removable drives.

How to set up RAID on Mac?

The Disk Utility also allows you to set up RAID on a Mac: just click File > RAID Assistant in the menu bar. Combine disks and partitions into one or more RAID sets and choose whether you want to mirror, stripe, or concatenate your data. This is an advanced feature most people won’t need to use, but it’s there if you need it.

How to open disk utility on Mac?

To access the Disk Utility on a modern Mac—regardless of whether it even has an operating system installed—reboot or boot up the Mac and hold Command+R as it boots. It’ll boot into Recovery Mode, and you can click Disk Utility to open it up .

What is disk utility?

Disk Utility shows internal drives and connected external drives (like USB drives), as well as special image files (DMG files) that you can mount and access as drives.

How to create an image of a partition?

Select the drive you’d like to create an image of, and then click File > New Image > Image From [Partition Name].

How to wipe a hard drive with security options?

You can use this feature to securely wipe a hard drive . Click a drive, then click the “Erase” button, then click “Security Options” to select a number of passes to overwrite the drive with. One pass should be good enough, but you can always do a few more if you feel like it. The maximum number is unnecessary.

What does RAID 1 mean?

Mirroring (RAID 1) means data you write to the RIAD is stored on each partition or drive for failsafe purposes. If one drive dies, your data is still available elsewhere. Advertisement.

Open Disk Utility

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:

Select 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.

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Part 1. What Is Disk Utility on Mac?

Part 2. How to Use Disk Utility?

  • Now that we know that a disk utility is vital in making sure that Mac is running smoothly, there are also a lot of potential problems that can arise and cause a stir. There are a lot of reasons where you can use disk utility on Mac. Here are the most common scenarios where you can run a diagnosis on your disk utility: 1. Your external device does not work 2. Unexpected closing or qui…
See more on imymac.com

Part 3. How to Repair Disk on Mac Using Disk Utility?

  • Just like we mentioned above, there are a lot of things your disk utility on Mac can do. For example, if the disk has problems and it is no longer letting you do anything on your device, you can scan and diagnose to understand the issue. If your Mac still powers on, the best way to determine the status of your system is to use iMyMac PowerMyMac. This is a safe and effectiv…
See more on imymac.com

Part 4. How to Optimize and Boost Disk on Mac?

  • In order to keep your disk healthy and well-performing, always ensure that you have a clean drive instead of a full disk. You can set a maintenance schedule to regularly clean up the drive or better yet use iMyMac PowerMyMac. As we introduced earlier, it runs a complete and comprehensive diagnosis on your system status and informs you of the possible culprits for slowness, and othe…
See more on imymac.com

Part 5. Conclusion

  • We have finally learned about what disk utility on Macdoes, how to use it, and even how to repair disks using disk utility. The next time you are experiencing any of the symptoms we gave earlier, use iMyMac PowerMyMacto scan the entire system. An error does not necessarily mean that you need to replace your disk. It might be a flu-like problem that...
See more on imymac.com

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