Open Disk Utility. Click on First Aid. For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button  or tab. Run First Aid on the Container Level. Before panic sets in, you want to launch Apple's Disk Utility and select Repair Disk from the First Aid tab. Some other features are dismissed along with the development of Mac operating systems. (Please note: If you're checking a Fusion drive, you must start up with OS X 10.8.5 or later. For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab. If Disk Utility tells you the disk is about to fail, back up your data and replace the disk… Click Run to begin checking the selected volume for errors. If repairs aren't successful, and you have a backup of all the data stored on the affected drive, then I recommend reformatting the drive and performing a clean install of OS X. Disk Utility first aid failed on "Container disk1" I just upgraded to the new macOS High Sierra today(9/28/17) Prior to updating i decided to run a quick disk utility scan to make sure everything is … If you run First Aid on a volume, Disk Utility verifies all the contents of that volume only.” Only that’s not what I have found. Select Disk Utility and click Continue. After Disk Utility is done checking the volume, select the next item above it in the sidebar, then run First Aid again. In the column on … This feature checks the file system for errors and attempts to correct them, all without much intervention from you. Disk Utility can be useful if you are working with RAID sets. The two methods are similar; the main difference is the need to boot from another volume instead of your normal startup drive. If your disk still doesn't appear in Disk Utility, your Mac might need service. If there is no Run button, click the Repair Disk … From the utilities window in macOS Recovery, select Disk Utility and click Continue. This can be any drive that has a bootable copy of OS X installed; alternatively, you can use the Recovery HD volume that OS X created when it was installed on your Mac. I recommend using the same version of OS X that is installed on your current startup drive.). Your Mac’s startup drive can’t be unmounted since it's in use, which means you will have to start up your Mac from another bootable device. Disk Utility Can’t Repair The Disk When a disk stops responding properly on Mac, most of the users navigate to the Disk Utility to run First Aid to repair the disk. Click Run to start the verification and repair process. The details will reveal the steps being taken by the verification and repair process. 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. Disk Utility can’t detect or repair all problems that a disk may have. How do I know if disk utility is working on Mac? Results below: Volume “Macintosh HD” Repairing file system. Disk First Aid is the name of a disk repair utility that was included or available for download in Mac OS 9.x or earlier. How Can I Repair My Hard Drive If My Mac Won't Start? Use the First Aid feature of Disk Utility to find and repair disk errors. 4) In the sidebar, select the volume you wish to repair. Disk Utility’s First Aid feature is able to verify the health of a drive and, if needed, perform repairs to the drive's data structures to prevent minor problems from turning into major issues. Across the top of the window is a button bar, containing commonly used functions, including First Aid. Disk First Aid is a free software utility made by Apple Inc. that was bundled with all computers running the classic Mac OS. You can either run the First Aid function on an entire disk, or an individual partition … It has multiple built-in capabilities that can detect and repair errors. 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: Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility. However, don’t give up; try rerunning the repair a few times. In general, you can just open Disk Utility from the Utilities folder of your Applications folder. If there is no Run button, click the Repair Disk … 4. The methods include starting up from your OS X Recovery HD volume, or another drive that contains OS X. “If you run First Aid on a disk, Disk Utility checks the partition maps on the disk and performs some additional checks, and then checks each volume. 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. 6) Click Repair Disk. Disk In this example, the last volume on the disk is Macintosh HD - Data. In some previous versions of First Aid, it was necessary to run the repair process multiple times to ensure the repairs were complete; that is no longer required. First Aid in Apple's Disk Utility is a small utility designed to verify and fix minor problems of a drive, such as repairing the drive's data structures, fixing external hard drives not mounting on Mac, external hard drive not readable on Mac … Because you'll probably be using Disk Utility occasionally, I suggest adding it to the Dock, to make it easier to access in the future. As an example, you may have a Western Digital drive listed, with two volumes below it named Macintosh HD and Music. If First Aid reports, “The underlying task reported failure,” this indicates First Aid failed at making the needed repair. Disk Utility’s First Aid feature is able to verify the health of a drive and, if needed, perform repairs to the drive's data structures to prevent minor problems from turning into major issues. In this example, the startup disk (APPLE HDD) has one container and two volumes (Macintosh HD, Macintosh HD - Data). RELATED: How, When, and Why to Repair Disk Permissions on Your Mac If a hard drive is acting up, Disk Utility’s First Aid function is the first thing you should try. If First Aid reports that the drive appears to be OK, or that the drive has been repaired, you’re done. Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Standard drives may show information about catalog files, catalog hierarchy, and multi-linked files, while Fusion drives will have additional items that are checked, such as segment headers and checkpoints. If you need help, please. If there is no Run button, click the Repair Disk button instead. Once you have successfully restarted from the Recovery HD, and have launched Disk Utility, you can use the method above for using First Aid on a non-startup drive to verify and repair the drive. Screen shot courtesy of Coyote Moon, Inc. Additional Guides That Can Help With Drive Problems, Using Disk Utility to Repair Hard Drives and Disk Permissions, Create Your Own Mac Recovery HD on Any Drive, Erase or Format Your Mac's Drives Using Disk Utility, Disk First Aid: Mac OS Disk Repair Utility, How to Format a Mac Hard Drive With Disk Utility, Perform a Clean Install of OS X El Capitan (10.11), How to Resize a Mac Volume With Disk Utility, How to Partition a Drive in OS X El Capitan Using Disk Utility, How to Perform a Clean Install of macOS Sierra, Disk Utility Can Create a JBOD RAID Set for Your Mac, Use Disk Utility to Create a RAID 1 (Mirror) Array, Back up Your Startup Disk Using Disk Utility, made a few changes to how the Disk Utility First Aid feature works, Use the Recovery HD Volume to Reinstall OS X or Troubleshoot Mac Problems. Get the Latest Tech News Delivered Every Day. In this example, the repair order is Macintosh HD - Data, then Macintosh HD, then Container disk3, then APPLE HDD. Follow the instructions on the screen, and when the menu bar appears, from the Utilities (Mac OS X 10.5 and later) or Disk Utilities (Mac OS X 10.4) menu, select Disk Utility. Disk First Aid … The Disk Utility window appears as three panes. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely. Now when you run First Aid, Disk Utility will verify the selected drive, and if errors are found, automatically attempt to correct the problems. Shut down your Mac, then unplug all nonessential devices from your Mac. Disk Utility is also a disk repair tool. Select your device that you are having problems with from the sidebar. The volumes are the items just below a device's primary name. If you don’t need the file, or you can easily recreate it, I highly recommend just deleting the file. If First Aid displays an “overlapped extent allocation” error, Disk Utility will create a DamagedFiles folder at the root level of your startup drive. With the advent of OS X El Capitan, Apple made a few changes to how the Disk Utility First Aid feature works. If Disk Utility found errors that it could not repair, use Disk Utility to erase (format) your disk. After analyzing … Performing fsck_hfs -fy … Be warned that these checks can take a while, and running them on your system drive will leave you with an unresponsive computer until it’s done. On the left is a sidebar that displays all the mounted volumes connected to your Mac; on the right is the main pane, which displays information from the currently selected activity or device. Click the triangle to show details. Errors can lead to … Another application called Drive Setup was used for drive formatting and partitioning and the application Disk Copy was used for working with disk … Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Is there a disk utility … If First Aid and the Live Verification process indicate that repairs are required on a volume, it’s time to boot from another disk drive and then run Disk Utility again. Using the First Aid option, you can address problems with your hard drive and potentially repair a damaged or corrupted disk. Select your device that you are having problems with from the sidebar. Click on First Aid. Your disk might not have a container, and it might have a different number of volumes. More than likely both files have become corrupt, but there's a small chance you can recover one or both of them. Ideally, it is recommended to use this feature every once in a while. In the classic Mac OS, similar functionality to the verification features of Disk Utility could be found in the Disk First Aid application. With the volume you wish to verify and repair selected, click the First Aid button on the top pane. The main change is that First Aid no longer has the ability to verify a drive independently of repairing it. You'll find complete step-by-step instructions for how to boot from the Recovery HD volume and start Disk Utility in our guide: Use the Recovery HD Volume to Reinstall OS X or Troubleshoot Mac Problems. If an error is found, First Aid will display an error, but make no attempt to repair the drive. If you're asked for a password to unlock the disk, enter your administrator password. This will help you diagnose the … Use the First Aid feature of Disk Utility to find and repair disk errors. First Aid Disk First Aid, Apple's well-known OS 9 repair utility, survives as part of Disk Utility in OS X. Booted with OS on USB external disk. 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. The drop-down sheet will be replaced with another sheet that shows the status of the verification and repair process. Hopefully, that will remedy the situation. If you must have the file, then. Run First Aid on each volume: Select a volume, such as Macintosh HD from the sidebar, then click the First Aid … If the button is dimmed and you can't click it, skip this step for the disk, container, or volume you selected. After Disk Utility has completed the check, select the next volume or container above it in the sidebar, then run First Aid again. If there are no errors found, you'll see a green check mark appear at the top of the drop-down sheet. Its main task is to verify and check the health of the disks and volumes on your Mac, such as Macintosh HD, SSD, external hard drives, USB … You can then restore your backup data. The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab. 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. Disk Utility First Aid is a built-in disk repair software in macOS. And beneath each disk you should see any containers and volumes on that disk. The First Aid function within Disk Utility can quickly check the status of your Mac disk, volumes, and external devices. The right pane will display information about the selected volume, including size and amount of space used. Click Run to begin checking the selected volume for errors. Fortunately for Mac users, there’s a built-in “boot disk… Click on View and select Show All Devices. Here is First Aid running on a HFS+ drive Volume level: Run First Aid … How to Use Disk Utility Just installed the beta of High Sierra on a mid-2014 macbook pro. 5) Click the First Aid button. Ran disk utility first aid to check internal HDD. Before El Capitan, you could just run the Verify process on its own, and then decide if you wanted to attempt repairs. Run First Aid … Open Disk Utility. You can examine the files in the DamagedFiles folder. You may be asked to select a user you know the password for. Click Run to begin checking the selected volume for errors. For example, you can't repair disk permissions in Disk Utility … If errors are found, the repair process will begin. Here are the two exceptions when the buttons are disabled: The start-up disk: Disk Utility can’t repair the start-up disk … This tool verifies and repairs a limited number of directory structure problems on any HFS or HFS Plus hard disk or volume.. It will include a small disclosure triangle in the bottom left side of the sheet. 3. However, when it fails to repair the disk, … Volume is already unmounted. However, in order for First Aid to perform any repairs, the selected volume must first be unmounted. We'll give you instructions for using Disk Utility’s First Aid on a non-startup volume, and then for using First Aid when you need to repair your Mac’s startup volume. You can use Disk Utility’s First Aid on your Mac’s startup drive. The overlapped error indicates that two (or possibly more) files occupied the same location on the drive being repaired. Select the user, then click Next and enter their administrator password. With the advent of OS X El Capitan, Apple made a few changes to how the Disk Utility First Aid … Most of the Mac users only use the First Aid feature of Disk Utility to fix their hard drives. Disk Utility will check the partition maps on the disk and check each volume. There are a couple of ways to get around the problem, so you can check and repair your Mac’s normal startup drive. Simply click the drive you want to check, then click the “First Aid” button. If Disk Utility can't see your disk, it also can't see any containers or volumes on that disk. Then turn the drive off and back on. The actual messages displayed will vary by the type of volume being tested or repaired. I routinely check that the FS has survived the upgrade process, so fired up disk utility and ran first aid … In our example, we'll use the Recovery HD volume that was created when you installed OS X. Verify a disk's integrity and repair it with First Aid if the disk is damaged or corrupted. Disk Utility can be used on your computer’s internal disks as well as peripheral storage devices that are attached to your machine. Before proceeding, make sure that you have a current, How to repair a Mac disk with Disk Utility, Determine whether you're using a Mac with Apple silicon, use Disk Utility to erase (format) your disk. A drop-down sheet will appear, asking if you wish to run First Aid on the selected volume. Use the sidebar to select the volume you wish to run First Aid on. System booted successfully first time. Some notes on what to expect when using First Aid to repair a drive: Disk Utility’s First Aid has a special “live mode” it will use when you run it on the startup drive. However, you're limited to only performing a verification of the drive while the operating system is actively being run from the same disk. Don't see your disk? Lastly, I ran First Aid on the Hard Drive itself: Run First Aid on the Hard Drive Level. Tom Nelson is an engineer, programmer, network manager, and computer network and systems designer who has written for Other World Computing,and others. 3) Select Disk Utility and click Continue. 7) Two things will happen: either the app will report that the disk … In this example, the last volume on the disk is Macintosh HD - Data. Launch Disk Utility, located at /Applications/Utilities/. From the First Aid pane, you can use Disk Utility on your MacBook to verify (or check) any disk (well, almost any disk) for errors, as well as repair most errors that it finds. 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. Disk Utility will check the partition maps on the disk and check each volume. In that case, follow these steps: Copyright © 2021 Apple Inc. All rights reserved. 2. In this example, the last volume on the disk is Macintosh HD - Data. 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