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Apple Disk iMaGe file format

9 votes
Accepted

Do I have to keep the .dmg files on my computer?

They are distributed inside an .dmg. To properly "install" them just open the .dmg and copy the app file to /Applications or /Applications/Utilities. … If the .dmg contains such a soft link just drop the app on it (like indicated by the grey arrow in the screenshot above). …
klanomath's user avatar
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7 votes
Accepted

Do files copied to an encrypted disk image (dmg) encrypt themselves?

It depends on your viewpoint: a file written to an encrypted disk image is immediately written encrypted to the HDD/SSD where the disk image resides. Since the file system of the unlocked disk image …
klanomath's user avatar
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4 votes
Accepted

How to open an encrypted dmg file in Windows?

According to the website HFSExplorer can open and read encrypted dmg images. HFSExplorer is an application that can read Mac-formatted hard disks and disk images. … HFSExplorer can also read most .dmg / .sparsebundle disk images created on a Mac, including zlib / bzip2 compressed images and AES-128 / AES-256 encrypted images. …
klanomath's user avatar
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3 votes

message: drag dmg file to applications folder keeps repeating

Double-click the dmg file. A new window should open or it is already open. … If you have been successful starting the application, unmount the image and delete the dmg file. …
klanomath's user avatar
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2 votes

Use mdfind to identify all encrypted dmg?

Spotlight just doesn't have sufficient metadata to differentiate the filesystem choices stored inside a DMG. … The proper command to check if a specific image file is encrypted is hdiutil isencrypted /path/to/dmg Example: host:~ user$ hdiutil isencrypted /Users/user/Downloads/test.dmg Output: encrypted: YES …
klanomath's user avatar
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2 votes

Changing icon of a mounted disk image

To add a custom icon to the mounted volume of your dmg file, you first have to convert it to a sparsebundle or at least to a r/w dmg: hdiutil convert -format UDSB -o /path/to/output/image /path/to/source …
klanomath's user avatar
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2 votes

How to mount big .dmg in small HD?

The command sudo dd if=/dev/sda of=/media/ubuntu/ntfsDisc/sda.hfs.dmg doesn't create a mountable dmg file! … So sda.hfs.dmg neither contains a valid file system (parts of the file could be extracted to contain one though) nor does it behave like a typical dmg. Instead it's a raw (data) file. …
klanomath's user avatar
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0 votes
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OS X 10.11 Disk Utility, encrypted dmg password and keychain

Using Disk Utility (in El Capitan) you won't be asked at all to save the password to a keychain while creating the encrypted dmg. … But after unmounting and reopening the newly created encrypted dmg you will be asked to enter the password and the option to save it to the keychain will be shown: …
klanomath's user avatar
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