OS X :: 128 Bit Disk Image Encryption Security?
Apr 21, 2006
This is mainly just one of those 'I always wondered' things. How secure really is the 128-bit encryption offered in Disk Utility? Is it virtually impossible to crack? Somewhat difficult? How long would it take someone who really knew what they were doing? If anybody wants to try, I made a sample encrypted disk image. See if you can get into it. Its 2MB and you can download it here. After downloading, you'll have to take the .txt off the end of the filename so its just challenge.sparseimage.
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Jun 5, 2014
I am doing some research for FileVault 2 on Mac and noted that there are full disk encryption function.Â
I would like to know where is the encryption key location for full disk encryption in FileVault?Â
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Nov 17, 2010
I am using OS 10.5.8.
In the past, I could double click on my disk image file (secure.sparseimage) and it would procede to ask for password and then open.
Since the last security update, when I double click on the same file, it opens disk utility. I then have to double click on the secure.sparseimage file in the left pane.
I checked disk utility preferences and it is still set to automatically open both read only and read and write disk images.
Anyone have the same experience and possibly an explanation or solution?
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Aug 24, 2010
Right, I want to secure my mac. Firstly, i understand a boot up BIOS password doesn't password the hard drive (i.e. you just take the hard drive out and someone can access all your documents). Is there any point in having a boot up password? The password that you set in security settings. Can you make it so that it cannot be removed by a system reset or password remover etc. Encrypted petition of the hard drive. This seems like the best option. Could i have say 20Gb of my hard drive encrypted, so that if someone stole my hard drive, documents stored in this petition could not be accessed. How would i go about this. And time capsule. How do i ensure that if someone steels my time capsule the data on it is secure and encrypted?
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Feb 26, 2010
My company is rolling out this for their macs and I'm curious to know what you guys thinks about it. My home mac has a partition for linux and for OSX, plus I'm generally concerned about interacting with the system when the disk is encrypted. Since its my home mac I really want to avoid needing to load this on. They're setting up policy that you must use whole disk encryption if you wish to log in via vpn - at least for windows and macs. Since I also use Linux I think I have a loop hole I'm still curious to hear people's opinion on PGP whole disk encryption.
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Jan 6, 2011
What is best disk encryption software for Mac? Are there any websites which reviews and lists best softwares like this? I'm interested how unbreakable code is and how safe it is, meaning that bugs etc don't cause any data loss.
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Dec 6, 2014
Why cant I resume the encryption. I connect the power and nothing happens. I retart with power added and I get a "Calculating time remaining" then right back to the title message. I just bought this Macbook Air and already this issue has happened and its drawing quite a bit of battery power. Also Apps using significant energy shows "Reverting from Filevault"...this does not look good on Mac
Info:
MacBook Air (13-inch, Early 2014), OS X Yosemite (10.10.1)
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Sep 10, 2009
Apparently, there are two ways to convert disk images in CDR format to ISO format:
1. Rename diskimage.cdr to diskimage.iso
Or
2. hdiutil makehybrid -iso -joliet -o diskimage.iso diskimage.cdr
The first method is really quick while the second method takes quite a long time. Do the two methods yield the same ISO file? In particular, I would like to convert a bootable CDR disk image to an ISO disk image.
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Jun 19, 2012
OS-X Lion I now have two useless FW800 external disk drives because I cannot turn off encryption and reformat the disk. (30 years ago, in DOS, this was called a "low level format".) I think I need to use Terminal commands diskutil eraseDisk or diskutil partitionDisk but nether of those commands work. Apparently, I cannot format the command correctly or diskutil cannot remove an encrypted partition.
Info:
Mac OS X (10.7.4)
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Mar 21, 2010
I have my internal hard drive (running 10.5) encrypted with PGP Whole Disk on my internal hard disk. I want to buy a new Mac and I have a full backup. Can I remove my internal drive, put it in an enclosure, connect it to another Mac with PGP installed, and mount it as a standard PGP encrypted whole disk?
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Nov 27, 2008
I have been trying to backup a few .avi files I have onto DVDs and after reading over the forums I have aquired ffmpegx and Toast 8. I place the avi file into ffmpex, encode it with the dvdffmpeg format. But once i burn it with toast, it takes the original wide screen avi file and stretches it to full screen.
I tried re-encoding with the DVD 16:9 setting selected with ffmpeg and it seems to look better in a preview, but when I try and burn the Video_TS folder in Toast it gives me the CSS Encryption disk error, which I do not understand because I'm not copying a copyrighted dvd.
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Jan 28, 2010
anyone with a 8600F scanner still works after updating to the latest security updates on osx? Mine stopped working after updating. I can still use the scanner in windows but not in osx. this is driving me nuts.
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Jul 17, 2010
My idiot teenage son left his retail disks somewhere two states away in his dorm room. I am upgradings his hard drive from a 40 gig to a 160gig in his ibook. We are visiting family so I don't have acess to my disk either. Can I copy his drive to a dvd, and then copy it over after I install the new hard drive? I've done this before, but never with a dvd or cd.
He is running 10.5.8.
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Nov 4, 2010
I have downloaded & installed Firefox but can't get rid of the disk image. I've tried dragging it to the bin but every time I use Firefox it re-appears.
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Jan 2, 2011
I have some files that I occasionally send to my family members. The thing is, because they contain sensitive information (finance records, sometimes they're family videos), I don't like just uploading it to my iDisk.
What I've been doing is going into Disk Utility, creating a password-protected disk image, then zipping up that file. It's a few layers of security, and the 128-bit encryption seems good. The thing is, I'm not sure what settings to use.
Here's a screenshot of the window that comes up when creating a new disk image. What options should I choose from here? I can do a Get Info on all of the files I'm putting in the disk image, but it would be easier to have it auto-fit whatever I put in, eliminating any unused space. I'm not sure of what to put for Format, Partitions, and Image Format, and I'm surprised that I have to choose a size since I've heard there's a way to have it automatically fit the files.
Is there a way to select my files/folders in the Finder and have a disk image created from the selection?
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Jul 19, 2009
I'm making a "backup" of the first season of House and I came upon the below menu from Disk Utility.
What's the best format to use? I don't really care too much about how long it takes.
Should I use encryption? If so, which form?
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Mar 21, 2010
I recently was having some problems with iTunes, (it was resetting and erasing the library every time i started it) so i decided to just save my mp3 files to my external hard drive and delete iTunes. My plan was to simply download iTunes again and put all my files back onto it.
However, when i downloaded iTunes, the disk image that apple gives you to set it up failed to mount. The reason, apparently, was because it was "Not Recognized"
I had no idea that an apple computer would not recognize one of the most common apple applications, but there you have it.
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Dec 13, 2010
I am currently using OSX 10.5.8 Leopard and have run into a problem. When ever I attempt to mount a .DMG file, Finder goes unresponsive and will not re launch. The .DMG is downloaded from a verified clean source and the default program to open is the Disk Image Mounter Utility. I try going to /System/Library/Core Services, and I see the Disk Image Mounter Utility listed, yet when I attempt to open it, nothing happens and it is not even listed in the activity monitor. I have tried mounting several .DMG files and each time the same problem occurs and can only be solved by rebooting the system. I have just recently tried updating my software to the latest version and still no fix.
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Dec 19, 2010
I'd like to save individual disc images of the OSX and Win 7 installs on two partitions on my drive so that I can restore the operating systems if I need to. How can I do this since both have different file systems? Do I use Carbon Cloner? How do I restore the Windows partition if I do this?
Also:
I installed Windows 7 32-bit Home edition on a 200gb partition using Bootcamp. I am installing and tweaking the Windows installation and would like to take a snapshot of the system after I have installed all programs and settings.
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Nov 24, 2007
I'm not sure if im doing the process right but whenever I try to resize a disk image it doesnt work, I go to disk utility/resize then I select the image I want to resize, nothing happens and I am stuck with the same size that is no longer big enough for my needs.
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May 26, 2009
I have all my OS X applications that come with your mac on a seperate .dmg file, that's just how it happened. I'm not sure how it happened, but when I took my computer home, it just installed like that. I bought the iMac ex-display from PC World last august and it didn't come with any documentation, reboot disks or an apple remote. They say they don't have them with them, but they obviously do.
I keep forgetting to mount the .dmg every time I reboot, because I'm a klutz and becoming old at a young age. I was wondering if there's any way to automatically have the mac mount the disk image?
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Oct 29, 2009
When I download a program or application, can I drag the disk image to the trash and eject the installer. This is an incredibly noob question, I know.
I just always end up with these random duplicate files and I can't figure out what I am doing wrong.
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Jan 29, 2010
I need to Install Mac OS 10.4 onto an iBook G3, and it only has a CD-RW drive, so I made a disk image and if I copy it ove to the iBook, will I be able to install from the Disk Image on it's own Hard Drive, or do I have to put it onto a Firewire drive?
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Mar 15, 2010
In doing a fresh install of OS X Tiger on my emac, can it be done by a disk image of Tiger or do I have to use the CDs? Reason being the CD thingy is not working.
Or, do I have to sacrifice the fresh install and use a USB Drive to upgrade it?
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Apr 19, 2010
I just purchased my 13inch MBP base model
I turned it on and I don't see any Disk image on my desktop...
I relaunched the Finder, but still the desktop is empty.
Is there something wrong with my MBP?
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Aug 31, 2009
How do I go about mounting a disk image? I have heard people refer to it but im not sure how it is done.
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Mar 22, 2012
I made a disk image to have a password protected folder, but now i can't delete it, even after i put in the password.
Info:
Mac Pro, Mac OS X (10.7.3)
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Apr 2, 2012
I have a 7.38 gb music iso disk image file that I wish to burn to a DVD disc. would I have to burn two DVDs or would I be able to compress this file to fit a single DVD disc? any mac wizards out there?
Info:
iMac PowerPC G3 600MHz (slot-load) (Summer 2001), Mac OS X (10.5.8), ~ 2.33 GHz Intel Core 2 Duo/2GB 667 MHz DDR 2 SDRAM ~ Dead iPod
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Apr 29, 2012
I downloaded the Final cut pro x trail today and tryed to open it in downloaded but the program refused and said the problem was that it was not recognized.The program was disk image mounter.
Info:
MacBook Pro, Mac OS X (10.7.2)
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Sep 6, 2014
I recently had some issues with my Mac Book Pro and I had to delete my entire Hard Drive. Using Disk Utility I backed it up first by taking a disk image of it all. I fixed my computer and now I am trying to work out how I can re-install my Hard Drive.Â
I open up the disk image, which takes hours to verify because there is so much stuff on it, and all my stuff is there. However, it doesn't update my computer to be how it was before and also it doesn't stay there, acting more like an external drive, so when I turn off my computer and then on again I need to go through the whole verification process. Â
How to use this disk image to go back to how my computer was set up?
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