About Disk Utility on Mac. 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. If you’re having problems with a disk, Disk Utility can check the disk and repair problems it detects. How to repair a disk To browse the Disk Utility User Guide, click Table of Contents at the top of the page. That allows you to run Disk Utility, reinstall or wipe and install the system, access Terminal for command-line functions, and so on. Mac 911 can’t reply to—nor publish an answer to.
Disk Utility User Guide
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You can use Disk Utility on your Mac to manage internal disks and external storage devices. Using Disk Utility, you can:
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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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