Mac Disk Repair Utility Free

Posted By admin On 16.11.21

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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. Jun 29, 2021 Stand-alone hard disk repair tool Mac users can run from a bootable device. Offers comprehensive hardware diagnostics. Can be used to remedy logical damage to data. Verdict TechTool Protogo is a Swiss Army knife-type repair disk utility that has been around since the days of Macintosh. Disk directory repair The great power of DiskWarrior consists in its ability to quickly build a replacement directory using data recovered from the original directory. In other words, the state-of-the-art technology featured by DiskWarrior is capable to recover files, data and folders in the most effective way.

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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.

Before proceeding, make sure that you have a current backup of your Mac, in case you need to recover damaged files or Disk Utility finds errors that it can't repair.

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:

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 the startup options window. Click the gear icon labeled Options, then click Continue.
- 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.
You may be asked to select a user you know the password for. Select the user, then click Next and enter their administrator password.
From the utilities window in macOS Recovery, select Disk Utility and click Continue.

Select your disk in Disk Utility

Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility.

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 should see any containers and volumes on that disk. Don't see your disk?

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

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.

In this example, the last volume on the disk is Macintosh HD - Data.

Click Run to begin checking the selected volume for errors.

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 the sidebar, then run First Aid again. Keep moving up the list, running First Aid for each volume on the disk, then each container on the disk, then finally the disk itself.

In this example, the repair order is Macintosh HD - Data, then Macintosh HD, then Container disk3, then APPLE HDD.

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.

If your disk doesn't appear in Disk Utility

If Disk Utility can't see your disk, it also can't see any containers or volumes on that disk. 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. 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.

Repairing, Restoring, or Reinstalling Mac OS X Software

If you have a problem with your Mac software or hardware, Mac OS X provides repair
and restore utilities that may eliminate problems and can even restore your software
to its original factory settings. You can access these utilities from the Mac OS X Utilities
application, even if your computer isn’t starting up correctly.

Use the Mac OS X Utilities application to:

Repair your computer’s disk using Disk Utility.

Restore your software and data from a Time Machine backup.

Chapter 3

Problem, Meet Solution

Reinstall Mac OS X and Apple applications.

Restore your computer to its factory settings by erasing its disk and reinstalling
Mac OS X and your Apple applications.

If your computer detects a problem, it opens the Mac OS X Utilities application
automatically. You can also open it manually by restarting your computer.

To open the Mac OS X Utilities application:

Restart your computer while holding down the Command (x) and R keys. The Mac OS X
Utilities pane appears.

Important:

If the Mac OS X Utilities application doesn’t open after restarting, hold

down Command (x)-Option-R and restart the computer to access the Mac OS X
Utilities software from the Internet. Your computer must be connected to a network
that has access to the Internet.

Some utilities in the Mac OS X Utilities application require access to the Internet and
the Mac App Store. You may need to make sure your computer is connected to the
Internet by using your Ethernet or Wi-Fi network.

To connect by using a Wi-Fi network:

Choose a network from the Wi-Fi status menu in the upper right corner of the screen.

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If necessary, type the network password.

To join a closed network, choose Join Other Network. Enter the network’s name
and password.

Chapter 3

Problem, Meet Solution

Repairing a Disk with Disk Utility

If you have a problem with your computer, or if you start your computer and see the
Mac OS X Utilities application, you may need to repair your computer’s disk.

Select Disk Utility in the Mac OS X Utilities pane and click Continue.

Select the disk or partition in the list on the left, and then click the First Aid tab.

Click Repair Disk.

Mac Hard Disk Repair

If Disk Utility can’t repair the disk, back up as much of your information as possible,
and then follow the instructions in “Reinstalling Mac OS X and Apple Applications” on
page 45.

For information about Disk Utility and its options, see Help Center, or open Disk Utility
(in the Utilities folder in Launchpad) and choose Help > Disk Utility Help.

Restoring Information Using a Time Machine Backup

If you previously created a Time Machine backup, use the Restore utility to restore
everything on your computer to its previous state.
Use your Time Machine backup to restore information only to the computer that was
the source of the backup. If you want to transfer information to a new computer, use
Migration Assistant (in the Utilities folder in Launchpad).

If your backup is on a Time Capsule, make sure you’re connected to an Ethernet or
Wi-Fi network. (To connect to a Wi-Fi network, follow the instructions on page 43.)

In the Mac OS X Utilities pane, select Restore From Time Machine Backup and
click Continue.

Select the disk that contains the Time Machine backup, and then follow the onscreen
instructions.

Chapter 3

Problem, Meet Solution

Reinstalling Mac OS X and Apple Applications

Under some circumstances, you may need to reinstall Mac OS X and Apple applications.
You can reinstall while keeping your files and user settings intact.

Make sure your MacBook Air is connected to the Internet by using an Ethernet or Wi-Fi
network. (To connect to a Wi-Fi network, follow the instructions on page 43.)

In the Mac OS X Utilities pane, select Reinstall Mac OS X and click Continue.

In the pane where you’re asked to select a disk, select your current Mac OS X disk
(in most cases, it is the only one available).

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To select or deselect optional software, click Customize.

Click Install.

You can install Mac OS X without erasing the disk, which saves your existing files
and settings, or you can erase the disk first, which erases all your data and leaves the
computer ready for you to reinstall Mac OS X and Apple applications.

After installing Mac OS X, you can go to the Mac App Store and re-download your
Apple applications.

Important:

Apple recommends that you back up the data on the disk before restoring

software. Apple is not responsible for any lost data.

Restoring Your Computer to Its Factory Settings

When you restore your computer to its factory settings, everything on your computer
(your user accounts, network settings, and all of your files and folders) is deleted. Before
you restore, back up any files you want to keep by copying them to another disk.
Write down your network settings from Network preferences to make it easier to get
connected again after reinstalling Mac OS X.

Chapter 3

Problem, Meet Solution

Make sure your MacBook Air is connected to the Internet by using an Ethernet or Wi-Fi
network. (To connect to a Wi-Fi network, follow the instructions on page 43.)

Mac Hard Drive Repair Software

In the Mac OS X Utilities pane, select Disk Utility and click Continue.

Select the disk in the list on the left, and then click the Erase tab.

Mac Hard Drive Repair

Select Mac OS Extended (Journaled) from the Format pop-up menu, type a name for
the disk, and then click Erase.

After the disk is erased, choose Disk Utility > Quit Disk Utility.

In the Mac OS X Utilities pane, select Reinstall Mac OS X and click Continue.

Apple Disk Repair

To reinstall Mac OS X and your applications, follow the instructions in the Mac OS X
Installer.

After restoring Mac OS X and your Apple applications, you can selectively restore your
other data and applications from a Time Machine backup.