OS X Recovery Disk Assistant v1.0. Built right into OS X, OS X Recovery lets you repair disks or reinstall OS X without the need for a physical disc. The OS X Recovery Disk Assistant lets you create OS X Recovery on an external drive that has all of the same capabilities as the built-in OS X Recovery: reinstall Lion or Mountain Lion, repair the disk using Disk Utility, restore from a Time Machine backup, or browse the web with Safari. A clone also comes in handy for troubleshooting, because you can use it to run third-party utilities on your ailing drive. (Your Mac's built-in OS X Recovery features include Disk Utility, but.
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 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]
Apple Disk Image files are published with a MIME type of application/x-apple-diskimage.
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]
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]
The Utilities folder on the Mac OS X CD contains Startup Disk version 9.2, the control panel you use to select the startup disk for your computer. Related Software. Parallels Desktop for Mac. Mac OS X disc image. Note that the latex style file axodraw4j.sty is not installed by this dmg. You have to download and install it separately. The Mac disc image was built on an Intel based MacBook running OSX 10.6.8 (Snow Leopard) and Java version 1.6.029.
In Mac OS X v10.2.3, Apple introduced Compressed Disk Images[4] 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]
https://ameblo.jp/mulmolankey8/entry-12650898867.html. 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]
https://drqas.over-blog.com/2021/01/amazon-alexa-mac-os.html. 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]
Photo premier software free download. 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. 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]
https://wine-download.mystrikingly.com/blog/plant-vs-zombies-2. There are few options available to extract files or mount the proprietary Apple Disk Image format. Song tracker software free download. Some cross-platform conversion utilities are:
- 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: Premiere pro releases.
- 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]
References[edit]
- ^ abcdefg'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
In this article, we will discuss the best software to clone your MacOS.
As its name suggests, a cloning app is used to create a bootable backup of your Mac hard drive. Not only this you can use cloning apps to clone Mac hard drive to SSD and vice-versa. While there is no denying that Mac is one of the sturdiest systems in the world, however, it is still a machine and is subject to wear and tear over time. This is one of the many reasons that you need a Disk Cloning App. So, if your system gives way or you wish to transfer your data from one system to another, you have a backup to fall back to. While more the features the better it is, a few features that you must look out for in the best disk cloning app for mac are, secure, reliable, compatible and simple to use.
5 Best Cloning Software for MacOS
Keeping in mind the above features, we bring to you the 5 best disk cloning app for Mac.
1. Stellar Drive Clone
Image Source: alternativeto.net
OS X Recovery Disk Assistant V1.0 - Apple Support
Stellar Drive clone is one of the best disk cloning app for Mac. It creates an identical, ready to use copy of the hard drive. The Clone software creates partitions in the same way as that of the actual hard drive. The tool supports various types of cloning like, HFS-to-HFS, FAT-to-FAT and NTFS-to-ExFAT. You can take a backup of any file or folder that you wish to. That is not all, the tool can also clone encrypted Mac drives and volumes. It can clone the Mac Hard drive from Hard Drive to SSD and vice-versa. The disk image will be your savior in case you feel that there is data missing on your disk.
2. EaseUS Todo Backup For Mac 3.4.19
Image Source: easeus.com
Todo is a multipurpose tool for data recovery. The software has a Mac Clone Utility Tool which clones the hard disk bit-by-bit. This would make the process of upgrading a disk or replacing it much easier and hassle free. The tool also allows the user to migrate their Mac Data from HDD or SDD with much ease. Apart from cloning the software has other features such as, File Synchronization on Mac and Backup. The latest version of the software also supports APFS format disks.
3. Carbon Copy Cloner
Image Source: cnet.com
One of the most popular cloning software, Carbon Copy Cloner (CCC), creates a backup of Mac OS boot drive and clones the disk. It has a simple and easy to use UI. The tool smoothly transfers files from one disk to another. The best part of the cloner is that it transfers everything block-level, disk to disk instead of file to file (which takes a longer time). The cloner also archives all old versions of files. It creates a backup of the hard drive and disk image. CCC schedules backup at regular intervals of time. For those new to the software, they have a feature called cloning coach which assists the user to make the right choices. Lastly, CCC lets you encrypt the disk and can also use it to migrate to a new Mac.
4. ChronoSync
Cached
An excellent app to clone Mac OS, Chrononym is a great option to backup data and clone hard drive. The app creates a backup of all the redundant and useless files on the Cloud. This also creates more space on the system. Can i get directv app on apple tv. A simple and interactive UI makes it easy to use. Apart from manual running of tasks the software allows user to schedule automatic disk cloning process from time to time. One of the best features of ChronoSync is that it allows user to transfer optimized files on Mac using Chrono Agent. This software can be used for multipurpose, to back personal data like photos and ensuring the safety of important data.
5. SuperDuper
Five Best Disk Image Tools
Utilities[edit]
https://wine-download.mystrikingly.com/blog/plant-vs-zombies-2. There are few options available to extract files or mount the proprietary Apple Disk Image format. Song tracker software free download. Some cross-platform conversion utilities are:
- 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: Premiere pro releases.
- 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]
References[edit]
- ^ abcdefg'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
In this article, we will discuss the best software to clone your MacOS.
As its name suggests, a cloning app is used to create a bootable backup of your Mac hard drive. Not only this you can use cloning apps to clone Mac hard drive to SSD and vice-versa. While there is no denying that Mac is one of the sturdiest systems in the world, however, it is still a machine and is subject to wear and tear over time. This is one of the many reasons that you need a Disk Cloning App. So, if your system gives way or you wish to transfer your data from one system to another, you have a backup to fall back to. While more the features the better it is, a few features that you must look out for in the best disk cloning app for mac are, secure, reliable, compatible and simple to use.
5 Best Cloning Software for MacOS
Keeping in mind the above features, we bring to you the 5 best disk cloning app for Mac.
1. Stellar Drive Clone
Image Source: alternativeto.net
OS X Recovery Disk Assistant V1.0 - Apple Support
Stellar Drive clone is one of the best disk cloning app for Mac. It creates an identical, ready to use copy of the hard drive. The Clone software creates partitions in the same way as that of the actual hard drive. The tool supports various types of cloning like, HFS-to-HFS, FAT-to-FAT and NTFS-to-ExFAT. You can take a backup of any file or folder that you wish to. That is not all, the tool can also clone encrypted Mac drives and volumes. It can clone the Mac Hard drive from Hard Drive to SSD and vice-versa. The disk image will be your savior in case you feel that there is data missing on your disk.
2. EaseUS Todo Backup For Mac 3.4.19
Image Source: easeus.com
Todo is a multipurpose tool for data recovery. The software has a Mac Clone Utility Tool which clones the hard disk bit-by-bit. This would make the process of upgrading a disk or replacing it much easier and hassle free. The tool also allows the user to migrate their Mac Data from HDD or SDD with much ease. Apart from cloning the software has other features such as, File Synchronization on Mac and Backup. The latest version of the software also supports APFS format disks.
3. Carbon Copy Cloner
Image Source: cnet.com
One of the most popular cloning software, Carbon Copy Cloner (CCC), creates a backup of Mac OS boot drive and clones the disk. It has a simple and easy to use UI. The tool smoothly transfers files from one disk to another. The best part of the cloner is that it transfers everything block-level, disk to disk instead of file to file (which takes a longer time). The cloner also archives all old versions of files. It creates a backup of the hard drive and disk image. CCC schedules backup at regular intervals of time. For those new to the software, they have a feature called cloning coach which assists the user to make the right choices. Lastly, CCC lets you encrypt the disk and can also use it to migrate to a new Mac.
4. ChronoSync
Cached
An excellent app to clone Mac OS, Chrononym is a great option to backup data and clone hard drive. The app creates a backup of all the redundant and useless files on the Cloud. This also creates more space on the system. Can i get directv app on apple tv. A simple and interactive UI makes it easy to use. Apart from manual running of tasks the software allows user to schedule automatic disk cloning process from time to time. One of the best features of ChronoSync is that it allows user to transfer optimized files on Mac using Chrono Agent. This software can be used for multipurpose, to back personal data like photos and ensuring the safety of important data.
5. SuperDuper
Five Best Disk Image Tools
Image Source: shirt-pocket.com
Super Duper is an excellent cloning app for Mac and definitely deserves a place in our list of top 5. while it does have a free version, it also offers a paid version which has exhaustive features. You can download the free version to clone your hard disk, however if you wish to avail other features like scripting, scheduling and smart updates you will have to buy paid services. It has a user-friendly interface which is easy to understand and use, even for first time users.
The need to clone Mac cannot be underestimated. We hope that this article could help you choose the best disk cloning app for Mac according to your requirements.
10 Responses
