hdiutil | Package hdiutil implements a macOS hdiutil command wrapper

I am working on bitstream (dd) images of disks from MacBook (Mac OS X 10.11.6) encrypted with File Vault 2. I do not have any password, passphrase or recovery key to unlock the drive, but I am not interested on unlocking/decrypting the drive.

I only need to extract all the possible information related to the login screen. This information should include usernames enabled to log in and password suggestions (if any). For password suggestion, I mean the suggestions which are available if you click on the question mark (?) at the right of the password box.

Here is an example of login screen:

Login screen example

As far as I understood, the system starts a special EFI pre-boot where it displays the FileVault 2 unlock screen with the icons of designated OS X accounts approved to unlock the disk. Login information (usernames, etc) should not be encrypted because they are available and visible when you start the system and before user logs in using the password (i.e., disk is not unlocked yet).

I have also tried to get this information by attaching the image and then using sudo fdesetup list -device but apparently this operation is not allowed for an external device. Again, I am not able to unlock the image because I do not have any password. However, I believe that usernames should be available somewhere in a not encrypted format because they are visible when I start the system.

Here is the output of diskutil list after attaching the disk image (stored in an external USB drive) with hdiutil attach -nomount /Volumes/USB/image.dd.dmg:

I would like to break out of a loop when it gets to a blank line in a file. The issue is that my regexp's used to condition my data create a line with characters so I need something from the beginning to check if a line is empty or not so I can break out. What am I missing?

I've been working on a hobby bootloader and kernel, but the bootloader never finds the kernel no matter what. Here is the bootloader:

I am trying to test a IO kit sample app that implements a filter scheme. See section 10.7.10 here for context. As the source there is hard to cut and paste (and when I tried I got errors), I am using the source from here which builds.

In the last figure on that page (1038) it has a series of steps for creating and mounting a new HFS volume. The idea is to see that the KEXT is working and doing encryption. I have built the sample KEXT and tested with it, but I always get "No mountable file systems" error when I make the "open" call. I have verified the KEXT is properly loaded.

If I remove the "-partitionType" I am able to manipulate the volume normally (though this doesn't involve the KEXT).

Can someone please suggest what might be going wrong here?

Part of my confusion in figure 1038's script is the "detach" command that is run before the open. It fails for me, but I am not sure if that is what is causing the "open" after it to fail, or is unrelated.

I recently created a .dmg for my application using macdeployqt. The application works fine on other Macs, but I noticed that the original location of the built .app is at the top of the window after double clicking on the .dmg:

This is visible even on other Macs, and I'd rather it not be, since it seems like irrelevant information for an end user. I tried looking at the .dmg with these commands:

I am trying to distribute an application (itself code-signed) inside a code-signed DMG volume, signed by a self-signed code certificate (generated using the Keychain Certificate Assistant).

I’m on macOS Mojave and I am creating the DMG using the following procedure:

1. Create a new empty folder testsrc
2. Copy code-signed app bundle into the new folder

3. Run

   ...

I have a script where I create a disk image of an SD card using hdiutil and then mount that disk image. I then write extended attributes to the files inside using xattr and important them into a program. Is there any way I can reverse those xattr writes so they don't save when I unmount the image? Ideally I'd keep an untouched copy of the SD card for archive. Is there a way to mount a disk image, make changes to the files inside, then unmount it and those changes aren't "Saved"? I'm trying to avoid copying the SD card twice for time reasons.

I've written a little script that uses the hdiutil in OSX but I'm having an issue when passing a path to the output variable where the path contains spaces. The path is generated simply by the user dragging the path folder onto the terminal window and then reading that to a variable. Basically I have for the path:

hdiutils, when fed a correct path to a valid file, returns error 2, no such file or directory. When I join the indices of the command array with " ", print them, copy them and run the exact string in a terminal, it works fine.

This is the function edited to contain only the relevant bits. In order to reproduce my error, you will need a disk image located at ~/Downloads/StarUML.dmg.