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Date: Mon, 28 Jan 2019 17:53:35 -0600
From: Morgan Woodward <>
Subject: Re: DMG file password cracking

Does this give you access to the actual files?

On Wed, Jan 9, 2019 at 3:36 PM Solar Designer <> wrote:

> Hi Morgan,
> On Wed, Jan 09, 2019 at 03:20:57PM -0600, Morgan Woodward wrote:
> > I've put myself in quite the predicament. I have locked myself out of a
> > password protected .dmg file that contains months of research I worked on
> > over the summer. I let it sit too long and now I can't remember exactly
> > what the password is. I know generally what it should be, but I can't get
> > it after trying about 100 different passwords. I am looking to download a
> > program that can help me brute force crack it. Which do you recommend? I
> > have very basic computer knowledge, but can learn pretty easily. I have a
> > macbook air running OS High Sierra 10.13.6
> You can try one of the community-contributed builds of JtR for macOS:
> On newer hardware, use the "avx2" version.  If it tells you "Sorry, AVX2
> is required for this build", then use the "sse4" version found nearby.
> You'll need to first use the dmg2john program on your .dmg file,
> redirecting this program's output to a text file, like this in a
> Terminal after cd'ing to the "run" directory:
> ./dmg2john /path/to/file.dmg > file.txt
> Then use JtR itself on the resulting file, like this:
> ./john file.txt
> Once you confirm you got this working, the community in here will help
> you focus the attack based on whatever you recall about the password.
> Alexander

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