OS X :: Creating A Disk Image?
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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Jun 20, 2012
I have just finished setting up my first Lion Server from scratch on a Mac Mini with dual 500GB Drives which I set up as RAID 1. I have the server exactly as I want it, and before the users start logging on and it gets all screwed up I would like to create a disk image of it so that I could reinstall if necessary w/o having to start from scratch.
Is the process of creating a disk image for a RAID 1 any different than that of a disk image from a single drive set up? Will Disk utility just see this as a single volume or will it want to create a disk image of the entire RAID? i.e will the disk image be 1 TB (500 GB x 2)? And when it comes to reimaging my RAID, will I just recreate a RAID 1 and be able to write to it from that disk image?
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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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Nov 2, 2006
I am creating a new image for some old iBooks that will be used in a school. To run a specific program I need to have OS 9.2 installed because it won't work any other way(even through the simulator). I have OS 10.2 installed on the master image iBook computer and have installed OS 9.2 through the restore disks. I can load up to both OS X and OS 9.2 but OS 9.2 does not take up the entire screen. It's contained within a small box in the middle of the screen.
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May 26, 2009
I'm currently in the process of trying to install Win7 on my Macbook Pro (purchased July '07) using an ISO burned to a DVD with Disk Utility. Unfortunately, the DVD isn't bootable, and while the symptoms match what's in this blog post, the author's solution involved using a Windows-only program.
I'd like to know if it's possible to re-burn the ISO without the version number in the filenames as in the original solution, but with Disk Utility or something else that a Mac can use.
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May 14, 2009
I want to upgrade my iMac G5 from its original 250GB disk to a 1TB WD Caviar Green.
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May 6, 2009
So I downloaded Windows 7, and Im kinda confused on how to make the boot disk. I have tried to use Disk Utility by selecting the ISO and clicking burn, but there is always an error. Do I burn the disk image itself, or the folder that comes from it?
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Dec 24, 2010
I have a Mac Pro that I want to create a mirrored RAID set in.
I have a 1TB Hard Drive that is the main system drive.
I just added a 2nd 1TB Hard Drive that I wanted to use along with this first hard drive to create a mirrored RAID set.
I used the following document to help with the process:
[URL]
I have opened up Disk Utility and think I may know how to do this but a few things concern me.
First, it states that it will erase the contents of the drives it's using to mirror. I had the idea it would simply duplicate the data onto the other drive. Is it true that it will delete the data on the current drive?
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Jun 16, 2008
i am trying to format a brand new 120 GB hard drive via an external USB 2.0 enclosure. About 25 minutes ago, I selected the "erase" option and slected the Mac OS Extended (Journal) Volume format. For the last 25 minutes, disk utility has been saying that it's creating a partition map. It's doing nothing.
I have reason to believe my enclosure may be faulty. (I had a similar problem on an old hard disk and thought that the problem was with the disk; now I know.) I need to know: How do I disconnect/eject the hard disk without damaging it? The eject option in Disk Utility is grayed out. If I attempt to quit Disk Utility I get a warning telling me I could leave my disk inoperable.
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Apr 5, 2010
I'm a serious photographer and do my post processing in Capture NX2 (2.2.4). Sometimes, especially when saving files, it drags on interminably. I have read that one way to speed up NX2 is to create a scratch disk. I'm currently upgrading my HD on my iMac G5 (Leopard) to a 1TB HD. Would it be wise (and efficient) to create a partition on the new HD and use it as a scratch disk? I understand you can't use the boot drive as a scratch disk, but if I partition will I be able toname the new partition something other than Macintosh HD, thus permitting use of a scratch disk?
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Jun 28, 2012
I'm low on internal hard drive space. Am using Time Machine. It appears that Time Machine is creating disk images in my downloads folder, taking up even more space. Is there some way to limit or stop that process and just use Time Machine to back up.
Info:
MacBook Pro (15-inch 2.4/2.2 GHz), Mac OS X (10.5.8)
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Aug 20, 2014
I have a new iMac using OS 10.9.4. I got an external HD for backup purposes and successfully formatted it. Now I want to create partitions; however, my Disk Utilities app does not contain any tab or command for creating partitions. Where should I be looking?
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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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Sep 2, 2014
My 500gb iMac (purchased April 2010) is about at capacity. 350gb of space is taken up by home movies (.mov) in iMovie. I bought an external hard drive and have moved about 200gb over to that drive.
After transfer, I deleted the original Events off iMovie and emptied the trash. I checked in both iMovie and in Finder and no longer see those files present on the Mac.
I thought this was going smooth and everything worked perfectly, but….when i went to check how much storage space i created on the Mac, the amount of available space barely budged (i moved 200gb of data to the new drive and i created about 30gb of space on the Mac).
Are these "deleted" files hidden somewhere and I need to go delete from somewhere else? How do I make sure I get back the storage that i need?
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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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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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Jun 3, 2014
Disk Utility Crashed whilst creating a Partition, and I now have ~100GB missing, which was the amount I had allocated to the new partition.
The new partition didn't get created, and I now have 100GB missing from the Hard drive. I have a 1TB hard drive, and when I go to Disk Utility, it says: Capacity : 999.35 GB (999,345,127,424 Bytes)Available : 586.1 GB (586,103,844,864 Bytes)Used : 310.52 GB (310,524,317,696 Bytes)
Which adds up to about ~900GB.
I tried Repairing Disk in Disk Utility, booting into Recovery Mode and Repairing Disk there, but neither made a difference.
Info:
MacBook Pro (15-inch Mid 2012), OS X Mavericks (10.9.3)
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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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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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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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