Disk Utility User Guide
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. Disk Utility can’t detect or repair all problems that a disk may have.
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. If you run First Aid on a volume, Disk Utility verifies all the contents of that volume only.
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- In the Disk Utility app on your Mac, choose View > Show All Devices.Note: If you’re checking your startup disk or startup volume, restart your computer in macOS Recovery, select Disk Utility in the macOS Utilities window, then click Continue. If you check your startup volume (Macintosh HD), make sure you also check your data volume (Macintosh HD - Data).
- In the sidebar, select a disk or volume, then click the First Aid button .If Disk Utility tells you the disk is about to fail, back up your data and replace the disk—you can’t repair it. Otherwise, continue to the next step.
- Mac dock for linux mint. Click Run, then click Continue.If Disk Utility reports that the disk appears to be OK or has been repaired, you’re done. You can click Show Details to see more information about the repairs. Otherwise, you may need to do one of the following.
- If Disk Utility reports “overlapped extent allocation” errors, two or more files occupy the same space on your disk, and at least one of them is likely to be corrupted. You need to check each file in the list of affected files. Most of the files in the list have aliases in a DamagedFiles folder at the top level of your disk.
- If you can replace a file or re-create it, delete it.
- If it contains information you need, open it and examine its data to make sure it hasn’t been corrupted.
- 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.
If your Mac has a Fusion Drive and you see a flashing question mark or alert, see the troubleshooting section of the Apple Support article About Fusion Drive, a storage option for some Mac computers.
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.
- There are many alternatives to DiskTools Pro for Mac and since it's discontinued a lot of people are looking for a replacement. The most popular Mac alternative is DriveDx.It's not free, so if you're looking for a free alternative, you could try Scalpel 2.0 or Cisdem Data Recovery.If that doesn't suit you, our users have ranked more than 50 alternatives to DiskTools Pro and 19 are available.
- TechTool Pro has long been one of the foremost utilities for keeping your Mac running smoothly and efficiently. With the release of version 12, it has become more proficient than ever. Main features: TechTool Protection - TechTool Pro 12 includes the option of installing a system preference pane to keep watch over your Mac. New features include check for I/O errors, Power On Self-Test errors.
Disk Drill Pro Enterprise. Disk Drill is a Mac data recovery software designed for Mac OS: regain lost information from Mac discs and readily protect your files from. DiskTools Pro For Mac 3.9.1 硬盘工具. Mail Designer Pro 1.1.2 for Mac邮件设计.
See alsoErase and reformat a storage device in Disk Utility on MacAdd, delete, or erase APFS volumes in Disk Utility on MacPartition a physical disk in Disk Utility on Mac
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Disk Utility User Guide
You can use Disk Utility on your Mac to manage internal disks and external storage devices. Using Disk Utility, you can:
- Format and manage volumes on physical storage devices.
- Create a disk image, a single file you can use to move files from one computer to another or to back up and archive your work.
- Combine multiple hard disks into a RAID set that acts as a single disk. Using multiple hard disks in a RAID set can increase the performance, reliability, and storage capacity of your data storage system, depending on the type of set you choose.
- Check for and repair errors on your disks and volumes.
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See alsoAdd, delete, or erase APFS volumes in Disk Utility on MacFile system formats available in Disk Utility on MacGet detailed information about a disk in Disk Utility on MacRepair a storage device in Disk Utility on MacErase and reformat a storage device in Disk Utility on Mac