Using a .DMG versus duplicating in Disk Utility

Hi All,
In Disk Utility, Help has a page for "Duplicating a CD or DVD" which utilizes creating a Disk Image and burning that image to a new DVD. As I have 2 drives, I tried to use te "restore" tab and simply drag the source and destination DVDs to the appropriate fields. It was possible to drag the ROM DVD to the source field, but the destination DVD (-R) would not mount. Any ideas why this was not possible?
Thanks

Sounds like there has been a disconnect between .dmg files and the application that mounts them, DiskImageMounter.
Select any .dmg file. Press COMMAND-I to open the Get Info window. In the Open With section select DiskImageMounter from the dropdown menu then click on the Change All button. If the application isn't listed then locate it in the /System/Library/CoreServices/ folder.

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Disk utility "You can't use this version of the application Disk Utility with this version of Mac OSX. You have Disk Utility 12.1"

I use mountain lion 10.8.1
I try start disk utility it only says: "You can't use this version of the application Disk Utility with this version of Mac OSX. You have Disk Utility 12.1"

To do a Reinstall of the OS boot to the Recovery HD, Command+r key at startup, then select Reinstall Mac OS X. the files will be downloaded from the internet and then the instal will begin.
With Mt Lion it is also available from the Mac App store in your Purchases area. You may be able to download it and then nmanually starting the install while booted to Mt Lion.
But I'd normally use the Recovery HD as that takes the installed OS out of the picture.

Why does .dmg creation fail in Disk Utility app ?

Want to duplicate a DVD with a VIDEO_TS folder containing various video files. Inserted the DVD, started Disk Utility, selected the mounted DVD in the Disk Utility left window, and chose File>New>Disk Image from (the mounted DVD name). In the Convert Image panel, I chose a name, selected "read-only" and hit Save. The Disk Utility Progress panel states a .dmg is being created and shows a progress bar. Then it displays the following message: "Unable to create 'disk2.dmg' - No such file or directory" I'm pretty sure the DVD I wish to copy was burned on a Windows PC.
Thoughts?
iMac 2 GHzIntel Core Duo Mac OS X (10.4.9) w/superdrive
iMac 2 GHzIntel Core Duo Mac OS X (10.4.9)

Hi and welcome to Discussions,
for such an easy task as duplicating I use SimplyBurns http://www.macupdate.com/info.php/id/19778/simplyburns
It's much easier to use than Disc Utility and/or making a DMG
first.
Regards
Stefan

Use a DMG for Time Machine Disk?

Hello everyone,
After extensive googling, it seems at first that Time Machine will not allow you to use a mounted disk image for a backup drive. I was wondering if there was a way to rig it up so that it would work, somehow disguising the mounted image as a hard drive.
My situation is as follows: I have an external FireLite Smartdisk hard drive for Time Machine backups. And yet, the drive is plenty big, while my computer's hard drive is fairly small. I want to have the backups not take up the whole drive, as they have. I attempted to partition the drive via Disk Utility, but it gave me the following error:
Partition failed with the error:
Filesystem resize support required, such as HFS+ with Journaling enabled.
I tried it with all file systems, including free space. I finally decided to try a sparse bundle disk image, with a size of 100 gb. I mounted it, went into Time Machine prefs, and it did not appear on the list of available disks.
Does anyone have any ideas?

I'd quit trying to outsmart the backup system (Time Machine is picky already) and focus on the hardware. I don't have one of those drives, but I'd be looking at why you can't repartition or format the drive. Firmware? Using a hub? Does it have a USB port you can try?
Many hard drives like the MyBook series have had problems with FW on Leopard and there are firmware updates for them. The USB ports worked fine.

My HD needs to be reformatted according to Disk Utility, but even when I use an external device for startup, Disk Utility cannot reformat the HD

I have a Macbook with a 500 GB Hard Drive. A routine check on Disk Utility told me the disk needed to be reformatted. I restarted from an external USB drive, but when I try to use Disk Utility to repair the HD or to reformat it, Disk Utility is unable to do anything with the HD (cannot repair, cannot erase,cannot reformat the HD). Is there a utility App that can help me with this, or is the HD unrecoverable?

Hi
Thanks very much for your reply. We have been starting up from a backup (USB) drive and use the disk utility that is on the backup drive so the internal (problem) HD is not being used for anything (except for wanting to repair it). Still Disk Utility cannot reformat or repair the drive. I have also run Onyx but it tells me everything is OK on the drive.
But I have made a little progress. Using my old install disk for Snow Leopard (10.6.3) I have managed to do a fresh install of the system on the internal HD. Unfortunately, I also asked the install disk to transfer/migrate the settings and documents from the backup drive back onto my internal HD. The install appeared to work, but then it got hung up on copying the documents from my backup drive to the HD. After letting it sit for 2 days without going anywhere, I stopped the install process. I am going to try again, just using my Snow Leopard CD to install Snow Leopard, and nothing else. If that works, I will then get on to the problem of copying the rest of the settings and documents from my backup.
But since the Mac works OK off the USB backup, and will also run off the install CD, I am guessing the problem is with the HD and the only solution might be to replace it if I can't repair it. But the macbook is several years old, and I am not sure it is worth buying a new HD for it.

Can I use the 10.4 DVD's Disk Utility to Repair 10.3.9 Boot Drive

Can I use the Disk Utility from my 10.4 DVD (by holding down C) to repair the boot drive of my friend's 10.3.9 iBook G3?
Thanks in advance-
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Unless you have a Tiger (10.4) retail install package, I don't believe so but I'm not positive.
Did your friend lose his/her Panther install package?
If so, he/she can use fsck instead.
fsck is a command-line utility that may be able to verify and repair a disk. If you can successfully start up in Safe Mode or use Disk Utility while started up from a disc, you don't need to use fsck. However, here are some situations in which fsck may be necessary.
Your Mac OS X disc isn't available.
Your optical drive isn't available.
You can't start with a Safe Boot.
http://docs.info.apple.com/article.html?artnum=106214

Restore on new drive: Time Machine versus "Restore" via Disk Utility

I am about to install a new 240GB OWC Mercury Electra 6G (6Gb/s) SSD into the main drive bay of my MacBook Pro, moving the original Apple-installed 120GB 3G (3Gb/s) SSD into the optical bay using an OWC "Data Doubler."
I have my entire Mac OS X Yosemite install, all apps, and all data (that is, the entire contents of the original SSD) backed up to an external Time Machine backup drive.
I'll want to make the new SSD in the main bay my bootable drive, restoring my original SSD's system to the new SSD. The original SSD will then be erased.
Question is, what are the differences between these two restore strategies:
1. Restore from Time Machine to the new SSD
2. "Restore" via Disk Utility, using my original SSD (in the optical bay) as the "Source" and the new SSD (in the main bay) as the "Destination"
Are there any fundamental difference between these two approaches? Such as:
- Is one faster than the other?
- Does one involve more or less risk in some settings or such being "lost in translation" and needing to be reset?
- Would both methods of restore include a recovery partition on the new SSD?
MacBook Pro (17-inch, Early 2011, Macbook8,3) | 2.3 GHz Intel Core i7 | Yosemite 10.10.2

Thanks Kappy - to clarify / confirm: are you saying that the "Restore from Time Machine" approach would *not* include the Recovery HD (and, possibly inferring, that under that approach, getting the Recovery HD would be possible but would require an additional step)?

.dmg keeps opening in Disk Utility

When I try to open a .dmg file by double clicking it it mounts it as a disk image on Disk Utility and from there I have to right click and select "Open Disk Image". This has only started happening since I've upgraded to OS Lion.
Any ideas?
Cheers

Sounds like there has been a disconnect between .dmg files and the application that mounts them, DiskImageMounter.
Select any .dmg file. Press COMMAND-I to open the Get Info window. In the Open With section select DiskImageMounter from the dropdown menu then click on the Change All button. If the application isn't listed then locate it in the /System/Library/CoreServices/ folder.

Difference between using bootcamp and building partitions with disk utility

hy everybody,
i successfully bought a mac (that was easy , installed windows 7 with bootcamp (quite easy) and now i 'd like to add linux also (considering ubuntu).
before i try to do it with bootcamp i'd like to know what the impact could be...
so i wonder; what does boot camp do and why shouldn't i do it manually with disk utility?
all inputs are welcome
cheers

Why not start by filling out hardware in your profile .sig as it makes a difference.

You can't use this version of the application "Disk Utility" with this version of OS X.

I have no access to activity monitor, disc utility, mail and more what do I do? Also can't burn CDs.

Welcome to Apple Support Communities
Reinstall Mountain Lion. Hold Command and R keys while your computer is starting and reinstall Mountain Lion. It will reinstall all your apps, so you will be able to use them and you won't lose any file

Help using "erase free space" feature in Disk Utility

If I try to "erase free space" on my hard drive, the task never completes, and a temporary file is created, which can be deleted upon restart. If I start up from the Tiger Install DVD to wipe the free hard drive space, will I still have this problem or will it work properly?
G5 Dual 2.3 GHz Mac OS X (10.4.6)

So how much "free space" for a Temp file do you need to even use "Erase Free Space"? I have 111G available (120G drive), and I have 50G "free space", and it uses up all my space for a Temp File, then won't proceed unless I "clear more room on your startup drive". I need over HALF the drive empty to even use "Erase Free Space"? It would be nice if Apple told us before we started the long process.

Problems with Disk Utility backup & restore via DMG disk images

I attempted to backup and restore a 2TB external raid storage device using the recommended Disk Utility procedure for 10.6.6. One of the HDDs in the raid enclosure had started to fail.
First step was to create a new image from the 2TB device. I accepted the defaults of compressed image format and no encryption. The image took about 15 hours to create, and when complete, I was left with 2 files:
OWC2TB.dmg (1.1TB)
OWC2TB.002.dmgpart (486GB).
To check the DMG I ran the Disk Utility "Verify Disk" on the DMG, and got the message "The volume OWC2TB appears to be OK". The DMG is described in DU as:
Description: Apple UDIF read-only compressed (zlib)
Connection Bus: Disk Image
Total Capacity: 2 TB
Disk Write Status: Read Only
Partition Map Scheme: No partition map
I then replaced the failing HDD in the enclosure, recreated a new 2TB filesystem on the device, and attempted to restore from the DMG image.
The first attempt was to use Disk Utility "Restore" function. I specified the DMG as the source and the new device as the destination, and chose "Erase Destination". This failed immediately with the error "Restore failure. Could not find any scan information. The source images needs to be imagescanned before it can be restored".
After researching this error I tried to correct it by selecting the DMG in Disk Utility and running Images => Scan Image for Restore. This failed immediately, complaining there was insufficient disk space. More research revealed it needed the same amount of spare space on the same disk to do an imagescan. So I had to free up an EXTRA 1.5TB of space in addition to the space the DMG consumed. Not very user friendly.
The next attempt to imagescan the DMG got further than the "insufficient space" error. It displayed "Scanning image OWC2TB.dmg, Block Checksum Partition #1". This ran for about 10 hours. At the end, it displayed a new error message "Unable to scan OWC2TB.dmg (internal error)".
Next I tried to mount the DMG and copy the files manually. My first attempt at this resulted in a "Verifying..." phase which looked like it will take about 10 hours, so I clicked "Skip". Soon after I got an error message "Unable to attach OWC2TB.dmg (no mountable file systems).". Now I am trying a mount with the Verify option...
Can anyone suggest what I can try next to restore the DMG?
I think the problem might be the fact the DMG is split in two parts, but the imagescan/restore software does not know how to read the second part? Is there a way to join these into a single DMG?

I attempted to backup and restore a 2TB external raid storage device using the recommended Disk Utility procedure for 10.6.6. One of the HDDs in the raid enclosure had started to fail.
First step was to create a new image from the 2TB device. I accepted the defaults of compressed image format and no encryption. The image took about 15 hours to create, and when complete, I was left with 2 files:
OWC2TB.dmg (1.1TB)
OWC2TB.002.dmgpart (486GB).
To check the DMG I ran the Disk Utility "Verify Disk" on the DMG, and got the message "The volume OWC2TB appears to be OK". The DMG is described in DU as:
Description: Apple UDIF read-only compressed (zlib)
Connection Bus: Disk Image
Total Capacity: 2 TB
Disk Write Status: Read Only
Partition Map Scheme: No partition map
I then replaced the failing HDD in the enclosure, recreated a new 2TB filesystem on the device, and attempted to restore from the DMG image.
The first attempt was to use Disk Utility "Restore" function. I specified the DMG as the source and the new device as the destination, and chose "Erase Destination". This failed immediately with the error "Restore failure. Could not find any scan information. The source images needs to be imagescanned before it can be restored".
After researching this error I tried to correct it by selecting the DMG in Disk Utility and running Images => Scan Image for Restore. This failed immediately, complaining there was insufficient disk space. More research revealed it needed the same amount of spare space on the same disk to do an imagescan. So I had to free up an EXTRA 1.5TB of space in addition to the space the DMG consumed. Not very user friendly.
The next attempt to imagescan the DMG got further than the "insufficient space" error. It displayed "Scanning image OWC2TB.dmg, Block Checksum Partition #1". This ran for about 10 hours. At the end, it displayed a new error message "Unable to scan OWC2TB.dmg (internal error)".
Next I tried to mount the DMG and copy the files manually. My first attempt at this resulted in a "Verifying..." phase which looked like it will take about 10 hours, so I clicked "Skip". Soon after I got an error message "Unable to attach OWC2TB.dmg (no mountable file systems).". Now I am trying a mount with the Verify option...
Can anyone suggest what I can try next to restore the DMG?
I think the problem might be the fact the DMG is split in two parts, but the imagescan/restore software does not know how to read the second part? Is there a way to join these into a single DMG?

How do you use disk utility to burn a bootable .iso dvd?

Anybody have a clue on how you use disk utility to burn a .iso bootable dvd disk?
I'm trying to install windows 7 rc into virtual box in OS X 10.5.7 and cannot figure out how to do this. I've already installed the windows 7 beta in virtual box and was able to make a bootable dvd disk with the .iso file on it but have no clue how I did this.
I've been searching the web but most tips are for older version of OS X.
Thanks to anybody who answers.

It's so easy, You can just burn an .iso file using DVD Creator Std instead of Disk Utility, only 3 steps to finish bur ning your .iso files:
http://www.imediacreator.com/mac-dvd-creator-standard.html#131

Can I use the Leopard Disk Utility to repair a Tiger partition?

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thanks,
Chris Altwegg

You could use it, but if Tiger's Disk Utility couldn't fix it, it's doubtful Leopard's would fix it as well. You're better off using Disk Warrior from Alsoft.com.

Using Disk Utility to Migrate TM to a New Hard Drive

I'm posting this for search/google posterity:
Along with SuperDuper and CCC, plain old Disk Copy works perfectly for migrating a TM backup from one HD to a new, empty one. What I did:
1. Turn off TM
2. Go to Restore tab of Disk Utility
3. Set existing TM HD as the source, and the new HD as the destination
4. Click Restore button. Depending on the source HD size, this could take a while. My 400 GB source drive took about an 1.5 hours, with verification.
5. When done, you will have two HDs with the same name. Change the source drive's name.
6. Turn TM back on.
If all went well, TM should begin using your new HDs backup folder without a hitch.

This is great info. I use a 160gb portable drive with my MacBook Pro as my TM device. I have a fear that if anything happens to my laptop, the portable drive would be lost too since I carry them together. Ideally, I would like to periodically backup the portable drive to the Maxtor I have at home too and this seems like the easiest way to do it.
My question is, if I use the method described here with Disk Utility, does my Maxtor HD need to be a dedicated TM drive too? Will I have to create a partition so that I can continue to use my Maxtor to archive my data?

Using a .DMG versus duplicating in Disk Utility

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