Disk Utility was updated with Mac OS X
v10.3. Prior to v10.3, the functionality of Disk Utility was spread across two
applications:• Disk
Copy•Disk
Utility.
•Disk Copy was used for creating and mounting disk image files.
•Disk Utility was used for formatting, partitioning, verifying and repairing file structures. The ability to "zero" all data on a disk was not added until Mac OS X 10.2.3.•Further changes introduced in 10.4.3 allowed Disk Utility to be used to verify the file structure of the current boot drive.Mac OS X v10.5 Leopard added the ability to create, resize, and delete disk partitions without erasing them, a feature known as live partitioning.In versions of the Mac OS prior to Mac OS X, 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
•Disk Copy was used for creating and mounting disk image files.
•Disk Utility was used for formatting, partitioning, verifying and repairing file structures. The ability to "zero" all data on a disk was not added until Mac OS X 10.2.3.•Further changes introduced in 10.4.3 allowed Disk Utility to be used to verify the file structure of the current boot drive.Mac OS X v10.5 Leopard added the ability to create, resize, and delete disk partitions without erasing them, a feature known as live partitioning.In versions of the Mac OS prior to Mac OS X, 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
Tasks of Disk Utility
1.Creation, conversion, compression and
encryption of disk images from a wide range of formats read by Disk Utility.
•From .dmg (Macintosh OS X Disk Copy Disk Image
File ) to .iso
format.
•From CD/DVD images (.cdr ) to
.iso
format.
2. Mounting, unmounting, and ejecting disks (including both hard
disks, removable media and disk images).
3. Verifying a disk's integrity, and
repairing it if the disk is damaged (this will work for both Mac compatible
format partitions, and FAT-32 partitions with Microsoft Windows
installed).
4. Verifying and repairing permissions of
file and Hard disk.
Other Tasks of Disk Utility are:
O • Disk erasing, formatting, partitioning
and cloning.
• Secure deletion of free space or disk
using a "zero out" data Adding or changing partition table between
Apple Partition Table, GUID Partition Table, and master boot record (MBR):
•
creating, destroying, merging, and repairing RAID sets.
•
restoring volumes from Apple Software Restore (ASR) images.
•
burning disk images to CD or DVD in HFS+ format.
•
erasing CD-RWs and DVD-RWs
• Disk
Utility functions may also be accessed from the Mac OS X command line with the diskutil
and hdiutil commands.
Conversion of file from .dmg format to .iso
•Open Disk Utility (located in Applications>Utilities folder)
•Drag
your disk image into the left-hand pane (where all your drives are listed) of
Disk Utility.
•Click
on the file you just dragged into Disk Utility (should appear in the left-hand
column).
Click on the 'Images' menu, then
choose 'Convert...'
•When
the 'Convert Image' dialog pops up, select 'DVD/CD Master' from the 'Image
Format' pop-up menu. Name your file, with '.cdr' at the end of the filename, then
click 'Save.'
•Disk
Utility will convert the file to an ISO image. After this finishes, replace the
'cdr' at the end of the filename (in
the Finder) to 'iso'.
Repairing Mac Partition
•Click
on Hard disk that is on the left column and click on Repair Disk






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