- Repair a storage device in Disk Utility on Mac. 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.
- Disk utility free download - File Scavenger Data Recovery Utility, ShowSize Disk Space Analyzer, WinUtilities Free Disk Defragmenter, and many more programs.
Operating system | macOS |
---|---|
Type | Utility |
Website | support.apple.com/guide/disk-utility/welcome/mac |
Disk Utility is a system utility for performing disk and disk volume-related tasks on the macOSoperating system by Apple Inc.
Functions[edit]
Before Mac OS X Panther, the functionality of Disk Utility was spread across two applications: Disk Copy and Disk Utility. Disk Copy was used for creating and mounting disk image files whereas Disk Utility was used for formatting, partitioning, verifying, and repairing file structures. The ability to 'zero' all data (multi-pass formatting) on a. 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. Disk Utility First Aid is a built-in disk repair software in macOS. 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 drives, flash drives, and SD cards.
The functions currently supported by Disk Utility include:[1]
- Creation, conversion, backup, compression, and encryption of logical volume images from a wide range of formats read by Disk Utility to .dmg or, for CD/DVD images, .cdr
- Mounting, unmounting and ejecting disk volumes (including both hard disks, removable media, and disk volume images)
- Enabling or disabling journaling
- Verifying a disk's integrity, and repairing it if the disk is damaged (this will work for both Mac compatible format partitions and for FAT32 partitions with Microsoft Windows installed)
- Erasing, formatting, partitioning,[2] and cloning disks
- Secure deletion of free space or disk using a 'zero out' data, a 7-pass DOD 5220-22 M standard, or a 35-pass Gutmann algorithm
- Adding or changing partition table between Apple Partition Map, GUID Partition Table, and master boot record (MBR)
- Restoring volumes from Apple Software Restore (ASR) images
- Checking the S.M.A.R.T. status of a hard disk
Disk Utility functions may also be accessed from the macOS command line with the diskutil
and hdiutil
commands.[3]
History[edit]
In the classic Mac OS, similar functionality to the verification features of Disk Utility could be found in the Disk First Aid application. Another application called Drive Setup was used for drive formatting and partitioning and the application Disk Copy was used for working with disk images.
Before Mac OS X Panther, the functionality of Disk Utility was spread across two applications: Disk Copy and Disk Utility. Disk Copy was used for creating and mounting disk image files whereas Disk Utility was used for formatting, partitioning, verifying, and repairing file structures. The ability to 'zero' all data (multi-pass formatting) on a disk was not added until Mac OS X 10.2.3.[4] Further changes introduced in Mac OS X Tiger, specifically version 10.4.3, allowed Disk Utility to be used to verify the file structure of the current boot drive. Mac OS X Leopard added the ability to create, resize, and delete disk partitions without erasing them, a feature known as live partitioning. In OS X El Capitan, Disk Utility has a different user interface and lost the abilities to repair permissions due to obsolescence,[5] create and manage disks formatted as RAID, burn discs, and multi-pass format internal solid-state drives and encrypted external drives.[6]
See also[edit]
References[edit]
- ^'Disk Utility 10.5 Help: Testing and repairing a disk or volume'. Apple Inc.
- ^'Mac OS X 10.5: About resizing disk partitions'. Apple Inc.
- ^Landau, Ted; Frakes, Dan (December 20, 2005). Mac OS X Help Line, Tiger Edition. Peachpit Press. ISBN9780132705240.
- ^'Mac OS X: About the Mac OS X 10.2.3 Update'Archived March 27, 2008, at the Wayback Machine. Apple Inc.
- ^'OS X v10.11 Developer Beta 7 Release Notes'. Mac Developer Library. Apple Inc. August 18, 2015. Retrieved October 7, 2015.[permanent dead link]
- ^Cunningham, Andrew; Hutchinson, Lee (September 29, 2015). 'OS X 10.11 El Capitan: The Ars Technica Review'. Ars Technica. Retrieved September 30, 2015.
External links[edit]
Functions[edit]
Before Mac OS X Panther, the functionality of Disk Utility was spread across two applications: Disk Copy and Disk Utility. Disk Copy was used for creating and mounting disk image files whereas Disk Utility was used for formatting, partitioning, verifying, and repairing file structures. The ability to 'zero' all data (multi-pass formatting) on a. 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. Disk Utility First Aid is a built-in disk repair software in macOS. 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 drives, flash drives, and SD cards.
The functions currently supported by Disk Utility include:[1]
- Creation, conversion, backup, compression, and encryption of logical volume images from a wide range of formats read by Disk Utility to .dmg or, for CD/DVD images, .cdr
- Mounting, unmounting and ejecting disk volumes (including both hard disks, removable media, and disk volume images)
- Enabling or disabling journaling
- Verifying a disk's integrity, and repairing it if the disk is damaged (this will work for both Mac compatible format partitions and for FAT32 partitions with Microsoft Windows installed)
- Erasing, formatting, partitioning,[2] and cloning disks
- Secure deletion of free space or disk using a 'zero out' data, a 7-pass DOD 5220-22 M standard, or a 35-pass Gutmann algorithm
- Adding or changing partition table between Apple Partition Map, GUID Partition Table, and master boot record (MBR)
- Restoring volumes from Apple Software Restore (ASR) images
- Checking the S.M.A.R.T. status of a hard disk
Disk Utility functions may also be accessed from the macOS command line with the diskutil
and hdiutil
commands.[3]
History[edit]
In the classic Mac OS, similar functionality to the verification features of Disk Utility could be found in the Disk First Aid application. Another application called Drive Setup was used for drive formatting and partitioning and the application Disk Copy was used for working with disk images.
Before Mac OS X Panther, the functionality of Disk Utility was spread across two applications: Disk Copy and Disk Utility. Disk Copy was used for creating and mounting disk image files whereas Disk Utility was used for formatting, partitioning, verifying, and repairing file structures. The ability to 'zero' all data (multi-pass formatting) on a disk was not added until Mac OS X 10.2.3.[4] Further changes introduced in Mac OS X Tiger, specifically version 10.4.3, allowed Disk Utility to be used to verify the file structure of the current boot drive. Mac OS X Leopard added the ability to create, resize, and delete disk partitions without erasing them, a feature known as live partitioning. In OS X El Capitan, Disk Utility has a different user interface and lost the abilities to repair permissions due to obsolescence,[5] create and manage disks formatted as RAID, burn discs, and multi-pass format internal solid-state drives and encrypted external drives.[6]
See also[edit]
References[edit]
- ^'Disk Utility 10.5 Help: Testing and repairing a disk or volume'. Apple Inc.
- ^'Mac OS X 10.5: About resizing disk partitions'. Apple Inc.
- ^Landau, Ted; Frakes, Dan (December 20, 2005). Mac OS X Help Line, Tiger Edition. Peachpit Press. ISBN9780132705240.
- ^'Mac OS X: About the Mac OS X 10.2.3 Update'Archived March 27, 2008, at the Wayback Machine. Apple Inc.
- ^'OS X v10.11 Developer Beta 7 Release Notes'. Mac Developer Library. Apple Inc. August 18, 2015. Retrieved October 7, 2015.[permanent dead link]
- ^Cunningham, Andrew; Hutchinson, Lee (September 29, 2015). 'OS X 10.11 El Capitan: The Ars Technica Review'. Ars Technica. Retrieved September 30, 2015.
External links[edit]
To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart. Keep holding until the described behavior occurs.
Disk Utility For Macbook Air
- Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. If your Mac is using a firmware password, you're prompted to enter the password.
- Option (⌥) or Alt: Start up to Startup Manager, which allows you to choose other available startup disks or volumes. If your Mac is using a firmware password, you're prompted to enter the password.
- Option-Command-P-R:Reset NVRAM or PRAM. If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery.
- Shift (⇧): Start up in safe mode. Disabled when using a firmware password.
- D: Start up to the Apple Diagnostics utility. Or use Option-Dto start up to this utility over the Internet. Disabled when using a firmware password.
- N: Start up from a NetBoot server, if your Mac supports network startup volumes. To use the default boot image on the server, hold down Option-N instead. Disabled when using a firmware password.
- Command-S: Start up in single-user mode. Disabled in macOS Mojave or later, or when using a firmware password.
- T: Start up in target disk mode. Disabled when using a firmware password.
- Command-V: Start up in verbose mode. Disabled when using a firmware password.
- Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc. Disabled when using a firmware password.
If a key combination doesn't work
Canon pixma mp250 for mac installer. If a key combination doesn't work at startup, one of these these solutions might help:
- Be sure to press and hold all keys in the combination together, not one at a time.
- Shut down your Mac. Then press the power button to turn on your Mac. Then press and hold the keys as your Mac starts up.
- Wait a few seconds before pressing the keys, to give your Mac more time to recognize the keyboard as it starts up. Some keyboards have a light that flashes briefly at startup, indicating that the keyboard is recognized and ready for use.
- If you're using a wireless keyboard, plug it into your Mac, if possible. Or use your built-in keyboard or a wired keyboard. If you're using a keyboard made for a PC, such as a keyboard with a Windows logo, try a keyboard made for Mac.
- If you're using Boot Camp to start up from Microsoft Windows, set Startup Disk preferences to start up from macOS instead. Then shut down or restart and try again.
Remember that some key combinations are disabled when your Mac is using a firmware password.
Disk Utility For Mac On Windows
Learn more
Where Is The Disk Utilities For Mac
- Learn what to do if your Mac doesn't turn on.
- Learn about Mac keyboard shortcuts that you can use after your Mac has started up.