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For information about servicing your Mac, see Find out how to service or repair your Mac. 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. 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 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 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 it contains information you need, open it and examine its data to make sure it hasn’t been corrupted. If you can replace a file or re-create it, delete it. Most of the files in the list have aliases in a DamagedFiles folder at the top level of your disk. You need to check each file in the list of affected files. 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. Otherwise, you may need to do one of the following. Disk Utility is a built-in macOS diagnostic tool to eliminate fundamental issues such as directory structure damage, file system permission problem, and so forth. You can click Show Details to see more information about the repairs. You might have used the Disk Utility functionality of Mac to diagnose and resolve problems encountered in your Mac hard drive. If Disk Utility reports that the disk appears to be OK or has been repaired, you’re done. In the sidebar, select the storage device, then click the First Aid button.

Repeat steps 6 through 8 for each container on the storage device. In the sidebar, select a container, then click the First Aid button. Repeat steps 2 through 4 for each volume on the storage device. When the First Aid process is complete, click Done. In the First Aid dialog, click Run, then follow the onscreen instructions.

In the sidebar, select a volume, then click the First Aid button.

#Disk utility software for mac apple download#

As with all maintenance programs, however, read the reviews before you download and back up your Mac before using software intended to automatically delete files on your computer just in case.

#Disk utility software for mac apple pro#

If you check your startup volume (Macintosh HD), make sure you also check your data volume (Macintosh HD - Data). Is there a disk cleanup utility for Mac Disk Cleanup Pro is among the free utilities in the Mac App Store, and others can be found online. If you used Disk Utility from macOS Recovery, you can now restart your Mac: choose Apple menu  > Restart.Note: If you’re checking your startup disk or startup volume, restart your computer in macOS Recovery, select Disk Utility in the macOS Recovery window, then click Continue. The order of repair in this example was Macintosh HD - Data, then Macintosh HD, then Container disk4 and then APPLE SSD. 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.

#Disk utility software for mac apple password#

If you're asked for a password to unlock the disk, enter your administrator password.Īfter Disk Utility has finished checking the volume, select the next item above it in the sidebar, then run First Aid again.

If the button is dimmed and you can't click it, skip this step for the disk, container or volume you selected.

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

In this example, the last volume on the disk is Macintosh HD - Data.Ĭlick Run to start checking the selected volume for errors. For each disk you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab. Active KillDisk for Mac is an easy-to use & compact freeware utility that allows to sanitize attached media storage with the 24 international data.