Question: I have a corrupt.sparsebundle-file (a TimeMachine-backup file), that I would really like to fix, because there's some files in there that I need. I have tried using the Disk Utility app, but that didn't work. I also read that it should be possible to use the Terminal app to do this, but I've.
I upgraded my mac to High Sierra without backing up my data. Then my Mac wouldn’t login, it gives me a black screen then it restarts. So I decided to reinstall the software, but first I need to b. Sep 30, 2013 How To Backup a Mac Disk to DMG for Free. This OS X backup DMG file is an exact copy of the data on your hard drive. Or use the 'Attach non-mountable disk image' option in Disk Drill to.
I'm trying to do a complete backup of my wife's MB from my MBP. I booted the MB into Firewire Target Disk Mode, then used Disk Utility on my MBP to make a DMG of it onto another external FW drive. Here's the log from Disk Util:
Is a dmg file safe file.
2008-03-22 15:08:32 -0700: Creating Image “TiffanyBook032208.dmg”
2008-03-22 15:08:40 -0700: Preparing imaging engineÂ…
2008-03-22 15:08:44 -0700: Reading Driver Descriptor Map (DDM : 0)Â…
2008-03-22 15:08:44 -0700: (CRC32 $51B6B901: Driver Descriptor Map (DDM : 0))
2008-03-22 15:08:44 -0700: Reading Apple (Apple_partition_map : 1)Â…
2008-03-22 15:08:44 -0700: (CRC32 $A3D7DA6A: Apple (Apple_partition_map : 1))
2008-03-22 15:08:44 -0700: Reading (Apple_Free : 2)Â…
2008-03-22 15:08:45 -0700: (CRC32 $00000000: (Apple_Free : 2))
2008-03-22 15:08:45 -0700: Reading Apple_HFS_Untitled_1 (Apple_HFS : 3)Â…
2008-03-22 15:57:57 -0700: (CRC32 $CE3D7CF0: Apple_HFS_Untitled_1 (Apple_HFS : 3))
2008-03-22 15:57:57 -0700: Reading (Apple_Free : 4)Â…
2008-03-22 15:57:58 -0700: (CRC32 $00000000: (Apple_Free : 4))
2008-03-22 15:57:58 -0700: Adding resourcesÂ…
2008-03-22 15:57:59 -0700: Elapsed Time: 49m 13.314s
2008-03-22 15:57:59 -0700: File size: 28521921586 bytes, Checksum: CRC32 $C61693A6
2008-03-22 15:57:59 -0700: Sectors processed: 312581808, 79974513 compressed
2008-03-22 15:57:59 -0700: Speed: 13.2Mbytes/sec
2008-03-22 15:57:59 -0700: Savings: 82.2%
2008-03-22 15:58:01 -0700: Image “TiffanyBook032208.dmg” created successfully.
2008-03-22 16:08:24 -0700: Name : TiffanyBook032208.dmg
Type : Unattached Disk Image
Disk Name : /Cow-e-fornia/Backup/TiffanyBook032208.dmg
Disk Image Path : /Volumes/Cow-e-fornia/Backup/TiffanyBook032208.dmg
Disk Image Size : 26.6 GB (28,521,921,586 Bytes)
Location : External
2008-03-22 16:08:24 -0700:
2008-03-22 16:10:51 -0700: Attach Image “TiffanyBook032208.dmg”
2008-03-22 16:10:51 -0700: InitializingÂ…
2008-03-22 16:10:57 -0700: VerifyingÂ…
2008-03-22 16:10:58 -0700: Driver Descriptor Map (DDM : 0): verified CRC32 $51B6B901
2008-03-22 16:10:59 -0700: Apple (Apple_partition_map : 1): verified CRC32 $A3D7DA6A
2008-03-22 16:11:00 -0700: (Apple_Free : 2): verified CRC32 $00000000
2008-03-22 16:32:14 -0700: Apple_HFS_Untitled_1 (Apple_HFS : 3): verified CRC32 $CE3D7CF0
2008-03-22 16:32:15 -0700: (Apple_Free : 4): verified CRC32 $00000000
2008-03-22 16:32:15 -0700: Verification completedÂ…
2008-03-22 16:32:15 -0700: verified CRC32 $C61693A6
2008-03-22 16:32:15 -0700: AttachingÂ…
2008-03-22 16:32:16 -0700: Checking volumesÂ…
2008-03-22 16:33:14 -0700: Volume check completedÂ…
2008-03-22 16:33:14 -0700: AttachingÂ…
2008-03-22 16:33:14 -0700: FinishingÂ…
2008-03-22 16:34:06 -0700: Unable to attach “TiffanyBook032208.dmg”. (no mountable file systems)
When I tried to mount the image, it went through a 20 minute verification procedure, then failed with the 'no mountable file systems' error.
I tried mounting it from Finder by double-clicking the DMG and got the same error. So I deleted the DMG and re-created it from scratch (including rebooting the MB into TDM):
2008-03-22 16:37:54 -0700: Creating Image “TiffanyBook032208.dmg”
2008-03-22 16:37:58 -0700: Preparing imaging engineÂ…
2008-03-22 16:38:02 -0700: Reading whole disk (Apple_HFS : 0)Â…
2008-03-22 17:29:22 -0700: (CRC32 $DB22F44F: whole disk (Apple_HFS : 0))
2008-03-22 17:29:23 -0700: Adding resourcesÂ…
2008-03-22 17:29:25 -0700: Elapsed Time: 51m 20.825s
2008-03-22 17:29:25 -0700: File size: 28525037851 bytes, Checksum: CRC32 $7D6B0BB2
2008-03-22 17:29:25 -0700: Sectors processed: 312319584, 79999257 compressed
2008-03-22 17:29:25 -0700: Speed: 12.7Mbytes/sec
2008-03-22 17:29:25 -0700: Savings: 82.2%
2008-03-22 17:29:27 -0700: Image “TiffanyBook032208.dmg” created successfully.
I get the same failure, whether mounting from Finder or from Disk Utility.
WTF? Does anyone know what might be going on? I came > < this close to repartitioning her HDD, then I got the willies and decided to verify the image first. Good thing I'm paranoid, otherwise my wife would have had a factory-fresh MB right about now. -- View image here: https://cdn.arstechnica.net/forum/smilies/scared_classic.gif --
File TypeApple Disk Image
| Developer | Apple |
| Popularity | |
| Category | Disk Image Files |
| Format | Binary |
What is a DMG file?
A DMG file is a mountable disk image used to distribute software to the macOS operating system. The file is typically downloaded from the Internet by a Mac user, then double-clicked to install an application on the computer.
Dmg File Windows
Today, software developers typically build and distribute applications for Mac users as DMG, .APP, or .PKG files. DMG files are especially common since their contents can be verified upon installation to ensure they have not been tampered with and they can also be compressed to reduce the size of the installer.
When a Mac user downloads a DMG file, he can simply double-click it to open it with the DiskImageMounter utility that comes with macOS. When the DMG file is opened, it mounts a virtual disk on the desktop and in an Apple Finder window as if it was a CD or a USB flash drive that was just inserted into the computer.
In the Finder window, the Mac user can double-click the program icon, which is an APP file, to run the app. Or the Mac user can drag the program icon to the 'Applications' folder icon to move it to the 'Applications' directory in macOS.
After the software stored in the DMG file is installed, the DMG file is no longer needed. Therefore, DMG files can be deleted after installing the software.
.png "Backup dmg file no mountable password")
While DMG files are Mac-specific and not intended for use in Windows, there are several Windows programs that can extract their contents or convert them to other formats. Some programs include 7-Zip, PeaZip, and DMG2IMG.
NOTE: The DMG format replaced the .IMG file format, which was previously used in Mac OS Classic.
Dmg File Mac
Unknown files on your Mac? Try File Viewer.
Dmg File Pc
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