The icon depicts an internal hard drive within a generic file icon. | |
Filename extension | |
---|---|
Internet media type | application/x-apple-diskimage |
Uniform Type Identifier (UTI) | com.apple.disk-image |
Developed by | Apple Inc. |
Type of format | Disk image |
Apple[1]Disk Image is a disk image format commonly used by the macOS operating system. When opened, an Apple Disk Image is mounted as a volume within the Macintosh Finder.
An Apple Disk Image can be structured according to one of several proprietary disk image formats, including the Universal Disk Image Format (UDIF) from Mac OS X and the New Disk Image Format (NDIF) from Mac OS 9. An Apple disk image file's name usually has '.dmg' as its extension.
Features[edit]
DiskMaker X (formerly Lion DiskMaker) is an application built with AppleScript that you can use with many versions of OS X/macOS to build a bootable drive from OS X/macOS installer program (the one you download from the App Store). As soon as you launch the application, it tries to find the OS X Install program with Spotlight. Download Win32 Disk Imager for free. A Windows tool for writing images to USB sticks or SD/CF cards. This program is designed to write a raw disk image to a removable device or backup a removable device to a raw image file. It is very useful for embedded development, namely Arm development projects (Android, Ubuntu on Arm, etc).
- Compatible with disk images made by Active@ Data Recovery Software products Supports: Any PC-compatible file systems Supports: Any operating systems (Windows, Linux, Unix, Solaris, Mac OS X etc.
- In the Disk Utility app on your Mac, choose File New Image Blank Image. Enter a filename for the disk image, add tags if necessary, then choose where to save it. This is the name that appears in the Finder, where you save the disk image file before opening it. In the Name field, enter the name for the disk image.
- Obtain The macOS / OS X Disc Image Go to Macintosh HD Applications and locate the 'Install macOS / OS X version name here ' installer package (e.g. 'Install macOS High Sierra') or find your backup copy of it. Right/control click on the 'Install macOS / OS X' installer package and select 'Show Package Contents' from the contextual menu.
Apple Disk Image files are published with a MIME type of application/x-apple-diskimage.
Https profile callofduty com promotions redeemcode. Different file systems can be contained inside these disk images, and there is also support for creating hybrid optical media images that contain multiple file systems.[1] Some of the file systems supported include Hierarchical File System (HFS), HFS Plus, File Allocation Table (FAT), ISO9660 and Universal Disk Format (UDF).[1][2]
Disk Image Xml
Apple Disk Images can be created using utilities bundled with Mac OS X, specifically Disk Copy in Mac OS X v10.2 and earlier and Disk Utility in Mac OS X v10.3 and later. These utilities can also use Apple disk image files as images for burning CDs and DVDs. Disk image files may also be managed via the command line interface using the hdiutil utility.[3]
In Mac OS X v10.2.3, Apple introduced Compressed Disk Images[4] Oneplay tv para pc. and Internet-Enabled Disk Images for use with the Apple utility Disk Copy, which was later integrated into Disk Utility in 10.3. The Disk Copy application had the ability to display a multilingual software license agreement before mounting a disk image. The image will not be mounted unless the user indicates agreement with the license.[5]
An Apple Disk Image allows secure password protection as well as file compression, and hence serves both security and file distribution functions; such a disk image is most commonly used to distribute software over the Internet.
History[edit]
Apple originally created its disk image formats because the resource fork used by Mac applications could not easily be transferred over mixed networks such as those that make up the Internet. Even as the use of resource forks declined with Mac OS X, disk images remained the standard software distribution format. Disk images allow the distributor to control the Finder's presentation of the window, which is commonly used to instruct the user to copy the application to the correct folder.
A previous version of the format, intended only for floppy disk images, is usually referred to as 'Disk Copy 4.2' format, after the version of the Disk Copy utility that was used to handle these images.[1] A similar format that supported compression of floppy disk images is called DART.[1][6]
New Disk Image Format (NDIF) was the previous default disk image format in Mac OS 9,[1] and disk images with this format generally have a .img (not to be confused with raw .img disk image files) or .smi file extension. Files with the .smi extension are actually applications that mount an embedded disk image, thus a 'Self Mounting Image', intended only for Mac OS 9 and earlier.[7][2]
Universal Disk Image Format (UDIF) is the native disk image format for Mac OS X. Disk images in this format typically have a .dmg extension.[1]
File format[edit]
Apple has not released any documentation on the format, but attempts to reverse engineer parts of the format have been successful. The encrypted layer was reverse engineered in an implementation called VileFault (a spoonerism of FileVault).[8]
Apple disk image files are essentially raw disk images (i.e. contain block data) with some added metadata, optionally with one or two layers applied that provide compression and encryption. In hdiutil, these layers are called CUDIFEncoding and CEncryptedEncoding.[1]
UDIF supports ADC (an old proprietary compression format by Apple), zlib, bzip2 (as of Mac OS X v10.4), and LZFSE (as of Mac OS X v10.11)[9] compression internally.
Metadata[edit]
The UDIF metadata is found at the end of the disk image following the data. This trailer can be described using the following C structure.[10] All values are big-endian (PowerPC byte ordering)
The XML plist contains a
blkx
(blocks) key, with information about how the preceding data fork is allocated. The main data is stored in a base64 block, using tables identified by the magic 'mish'
. This 'mish'
structure contains a table about blocks of data and the position and lengths of each 'chunk' (usually only one chunk, but compression will create more).[10] The data and resource fork information is probably inherited from NDIF.Encryption[edit]
The encryption layer comes in two versions. Version 1 has a trailer at the end of the file, while version 2 (default since OS X 10.5) puts it at the beginning. Permute 2 2 1 6. Whether the encryption is a layer outside of or inside of the
blkx
metadata (UDIF) is unclear from reverse engineered documentation, but judging from the vfcrack
demonstration it's probably outside.[8]Utilities[edit]
There are few options available to extract files or mount the proprietary Apple Disk Image format. Some cross-platform conversion utilities are:
Disk Image Xbox
- dmg2img was originally written in Perl; however, the Perl version is no longer maintained, and the project was rewritten in C. It extracts the raw disk image from a DMG, without handling the file system inside. UDIF ADC-compressed images (UDCO) have been supported since version 1.5.[11]
- DMGEXtractor is written in Java with GUI, and it supports more advanced features of dmg including AES-128 encrypted images but not UDCO images.[12]
- The Sleuth Kit. Handles the DMG format, HFS+, and APFS.
Most dmg files are unencrypted. Because the dmg metadata is found in the end, a program not understanding dmg files can nevertheless read it as if it was a normal disk image, as long as there is support for the file system inside. Tools with this sort of capacity include:
- Cross-platform: 7-zip (HFS/HFS+), PeaZip (HFS/HFS+).
- Windows: UltraISO, IsoBuster, MacDrive (HFS/HFS+).[13]
- Unix-like: cdrecord and
mount
(e.g.mount -o loop,ro -t hfsplus imagefile.dmg /mnt/mountpoint
).[14][15]
Tools with specific dmg support include:
- Windows:
- Transmac can handle both UDIF dmgs and sparsebundles, as well as HFS/HFS+ and APFS. It is unknown whether it handles encryption.[16] It can be used to create bootable macOS installers under Windows.[17]
- A free Apple DMG Disk Image Viewer also exists, but it is unknown how much what it actually supports.[18]
- Unix-like:
- darling-dmg is a FUSE module enabling easy DMG file mounting on Linux. It supports UDIF and HFS/HFS+.[19]
See also[edit]
![Disk image x Disk image x](https://www.backup-utility.com/windows-10/images/create-disk-image-windows-10-4348/backup-tab.gif)
References[edit]
- ^ abcdefgh'hdiutil(1) Mac OS X Manual Page'. Archived from the original on 2016-05-14. Retrieved 2016-05-14.
- ^ ab'Mac OS X: Using Disk Copy disk image files'. Archived from the original on 2013-12-19. Retrieved 2013-04-25.
- ^
hdiutil(1)
– Darwin and macOS General Commands Manual - ^'Re: Some apps refuse to launch in 10.2.8! (OT, but very important)'. Archived from the original on 2014-01-17.
- ^'Guides'. Apple. Archived from the original on 2009-03-06. Retrieved 2010-10-27.
- ^'DART 1.5.3: Version Change History'. Archived from the original on 2013-12-19. Retrieved 2013-04-25.
- ^'Software Downloads: Formats and Common Error Messages'. Archived from the original on 2010-12-24. Retrieved 2009-05-06.
- ^ ab'VileFault'. 2006-12-29. Archived from the original on 2007-01-09. Retrieved 2010-10-27.
- ^Michael Tsai (2015-10-07). 'LZFSE Disk Images in El Capitan'. Archived from the original on 2017-04-09. Retrieved 2017-04-09.
- ^ ab'Demystifying the DMG File Format'. Archived from the original on 2013-03-17.
- ^'dmg2img'. Archived from the original on 29 November 2010. Retrieved 2010-10-27.
- ^'DMGExtractor'. Archived from the original on 2011-01-02. Retrieved 2011-01-03.
- ^MacDrive Features / Boot Camp / System Requirements /. 'MacDrive Home page'. Mediafour. Archived from the original on 4 October 2010. Retrieved 2010-10-27.
- ^'How To Convert DMG To ISO in Windows, Linux & Mac'. Archived from the original on 2010-03-07.
- ^'Convert DMG To ISO using PowerISO'. Archived from the original on 2009-05-02. Retrieved 2009-02-15.
- ^'About TransMac for Windows'. www.acutesystems.com.
- ^'Convert'. www.winytips.com. winytips. Retrieved 5 May 2020.
- ^Olivia Dehaviland (2015-03-03). 'Apple DMG Disk Image Viewer'. DataForensics.org. Archived from the original on 2015-04-02. Retrieved 2015-03-10.
- ^'darling-dmg'. darling-dmg. Retrieved 29 March 2015.
External links[edit]
- Apple Developer Connection A Quick Look at PackageMaker and Installer
- O'Reilly Mac DevCenter Tip 16-5. Create a Disk Image from a Directory in the Terminal
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Apple_Disk_Image&oldid=1005008962'
Regional mirror courtesy of Internet.bs registrazione dominio |
WinImage is a fully-fledged disk-imaging suite for easy creation, reading and editing of many image formats and fileystems, including DMF, VHD, FAT, ISO, NTFS and Linux. The disk image is an exact copy of a physical disk (floppy, CD-ROM, hard disk, USB, VHD disk, etc.) or a partition that preserves the original structure. With WinImage in place, you can recreate the disk image on the hard drive or other media, view its content, extract image-based files, add new files and directories, change the format, and defragment the image. All this and more is delivered in one intuitive user interface that enables imaging right out of the box.
The program has many utilitarian uses at home and in the office. As a serious PC user, you probably have tons of old but still useful floppy disks. With WinImage in place, you can turn them into disk images, which can be stored on the hard drive and recreated, when a need arises. In combination with a CD creating tool, WinImage can help you create your own custom boot disk with hardware diagnostic or virus cleaning software to bring a problem PC back up and running without being in Windows. As a hard-disk backup solution, WinImage allows you to save hours and even days restoring a system and configurations on a machine that has experienced a hard-disk crash or software corruption. Along with homes and offices, this ability is a must for training classes, where restoring torn down PC configurations quickly is critical.
WinImage is an ASP shareware program.
WinImage has many cool features!
WinImage is an ASP shareware program.
WinImage has many cool features!
- Create a disk image from a removable drive (like USB drive), CD-ROM, floppy,
- Extract file(s) from a disk image,
- Create empty disk images,
- Inject files and directories into an existing disk image,
- Change a disk image format,
- Defragment a disk image,
- A powerful 'Batch assistant' mode that lets you automate many operations,
- And many more!
WinImage uses a modern, cutting edge Windows interface, and is available for Windows 95/98, and Windows NT/2000/XP/2003 server in English, French, German, Italian, Portuguese and Spanish.
WinImage is shareware. You may evaluate it for a trial period of 30 days. After 30 days, if you wish to continue using WinImage, you need to register. Click here to download WinImage.
- WinImage can be used as portable software (without installation and registry modification), using Xml preference options.
- Write FAT16 or Fat32 bootable image to a removable drive, after erasing, and rebuild partitition table.
- fixes for Windows Seven compatibility problem.
- Compatibility with VMWare Vmdk Disk image.
- fixes for Windows Vista compatibility problem.
- Compatibility with Virtual Hard Disk image (used by Microsoft® Virtual PC and Virtual Server), in both read only or read/write mode.
- Support of NTFS and Linux EXT2FS/EXT3FS image (only in read only mode)
- Connecting on Linux partition (to view content of Linux partition on connected hard disk)
- Speed improvement in read of write password encrypted file
- New toolbar and icon
- Interface improvement: A folder bar can be displayed with the tree of the image in memory. The “folder bar” item in Options menu can be used to enable/disable it
- Option to save/restore/reset the Master Boot record of physical drive (to standard Windows)
- Option to mount CDRom image and uncompressed file image, if the FileDisk drivers is loaded.
- Self-extracting file can (option /R) extract to removable drive, by resizing image. You can extract a self extracting bootable floppy to USB key with this feature
- You can export an hard disk fat image to an image with MBR. This is useful for CD-ROM burning software that don't add the MBR
- You can move file from one folder to another by drag it to the treeview
- The option to modify image size allow you choose the physical drive parameter
- You can modify image and and defrag large FAT image not loaded in memory
- With previous version of WinImage, all image with size equal or below 2.88 MB are loaded in memory, and all image bigger are stored on uncompressed .IMA file. The limit size for image in memory is now user defined (in Options Settings, Image tab). This is useful because some features are only available on image loaded in memory, like same as .IMZ compressed file.
- You can now select the size of an image (when you create a new image or change format) with three new options: import the size from existing image file (or from boot sector file), get the size of an existing partition, or enter custom value
- You can view the boot properties of a CDRom image
- The boot sector properties dialog box is now available on FAT32 image. This is useful to create FAT32 bootable image
- 64 bits version for Intel Itanium and x64 (for AMD 64 bits and Intel EM64T)
- minor bug fixes (including some fixes on code which create CDRom image under Windows NT/2000/XP/2003)
New for version 6.10
- Compatibility with some CDRom images file (some version of Easy CD Creator…) is added
- Displaying very large directory(>500 files by example) is faster again. Useful for ISO or hard disk image
- Several minor bug fixes.
New for version 6.0
- The /MAKESFX option is fixed (for creating SFX .EXE from the command line).
- New Self Extractor command line options.
- WinImage can now open/read/write Linux EXT2fs images, but will not interpret the contents of the file system (like Macintosh floppies).
- Displaying very large directories (for instance, images with more than 500 files) is faster. Useful for ISO CD-ROM images.
- Better support of DBCS resource files under Windows 2000.
- File may be saved with a password. WinImage uses the MD5 algorithm to build a 128 bit key, with Rijndael encryption. For more info, see http://www.esat.kuleuven.ac.be/~rijmen/rijndael/index.html. Before sending an encrypted file, check to see if the laws of your country permit 128 bit encryption.
- Files in .ISO CD-ROM images can may replaced with a file that has the SAME LENGTH, and the SAME FILENAME as the original file. Note: This is because the .ISO file format is not designed to allow later modifications.
- When starting under Windows 2000 (or Windows NT4) with and old and buggy ASPI layer, previous WinImage versions sometimes crashed. This has been fixed.
- WinImage can now be installed with a self-installing setup executable.
- More minor bug fixes.
New for version 5.0
- File Properties allow you to modify the names and attributes of files within images.
- Better international support: WinImage and self-extracting files can be now translated to Far Eastern languages (like Japanese).
- The CD-ROM ISO image creation option is now compatible with Windows 95/98.
- Inject and Extract progress dialog boxes contain a 'Stop' button.
- The delete option can now delete non-empty subdirectory in disk images (and do recursive deletes).
- The open a Fat32 option is faster and has better support for large FAT32 partitions.
- The documentation now officially mentions WinImage Year 2000 compatibility (but previous versions were already fully Y2K compliant). And only in professional mode :
- File Properties allow modification of the dates of files within disk images.
- Self extractor file creation is now integrated into the WinImage interface, and SFX executables are now localized (in WinImage 4.0, SFX files were only in English).
- More options in the self extractor.
- The WinImage SDK has been released.
These features were added in version 4.00:
- Command line options.
- There is now a true wizard (several screens with Next and Previous buttons!) as an alternative to the Batch assistant dialog box.
- Under Windows NT, WinImage can directly open a Fat32 partition on the disk (useful because Windows NT 4.0 cannot directly read Fat32 partitions).
- Batch options can be saved in a .BWZ file.
- Option to display an icon in taskbar while WinImage is working.
- Option to automatically show the WinImage window when user input is needed.
- Toolbar buttons are modernized.
- Only a Win32 version of WinImage is available. Users of Windows 3.1 need to install Win32s 1.30 to use WinImage. And, in the professional version :
- Self extractor with an unlimited redistribution license
- You may export the directory of the current image file in text or HTML.
- You may print the directory of the image file
- Editable boot sector properties (i.e. loading another boot sector file, manually editing the text of the boot sector).
- Supports the creation of large images of removable disks and hard disks under Windows NT and Windows 95. Large images (> 2.88 MB) are not loaded in memory, read and write operations are done directly on image files.
These features were added in version 3.00:
- Adds ZIP compatible compressed image files (.IMZ and .WLZ)
- Adds comment to compressed image files
- Adds drag and drop from WinImage to Windows 95/Windows NT 4.0 Explorer for file extraction
- When you drag a file into WinImage without opening an image, WinImage will automatically display the 'New' dialog box
- WinImage can copy MacIntosh 1.44 MB floppies, but it cannot view the files inside the image
- Under Windows NT, WinImage can build CD-ROM ISO compatible images
These features were added in version 2.50:
- Support of the new ListView control and tabbed dialog boxes for configuring settings under Windows NT 3.5x, Windows 95 and Win32s 1.30
- Open an Iso CDRom image in read-only mode
- Fixed a bug for formatting DMF floppy disks under Windows 95
These features were added in version 2.20:
- Support for Win32s for the 32 bit Intel version running under Windows 3.1x
- Explorer-like icons for Windows 95
- Improved DMF floppy disk support: Can read/write/format DMF disks under Windows 3.1, Windows 95 and Windows NT