Disk Image (.dmg) files no longer mount

Since updating to 10.4.9, I cannot mount disk image files. When I double click on them, I get an error dialog from Finder which reads, 'The Following disk images failed to mount.' Reason: 'Device not configured.' I suspect that some essential software, 'Disk Copy' and/or 'Diskimagemounter' did not, for one reason or another install with the rest of the update. My computer did crash when the update was almost complete, but after a restart, everything seemed to work OK, except for not being able to mount disk images, which in this age of downloadable software basically makes your Mac dead in the water. Any solutions, suggestions would be greatly appreciated. Thanks all!

Your Mac crashed before the update installation process was complete and before the prompt to restart?
If so - Houston, we have a problem. ;~)
Did you check your boot volume for any directory problems with Disk First Aid repair via Disk Utility when booted from your Tiger install disc immediately before the install and did you quit all running applications before the install?
Regardless and as a first step, check this link for system troubleshooting procedures and when doing so, follow all steps/instructions in the order provided.
http://www.thexlab.com/faqs/repairprocess.html
Test if this resolves the mount disk images problem since you should download the 10.4.9 Combo Update and re-install 10.4.9 since your Mac crashed before the install was 100% complete.

Similar Messages

Disk Utility crashes and dmg files won't mount

My girlfriend's Powerbook has been acting up for a while now, and we still can't seem to get it working properly.
One day, her Adobe programs just stopped working. Tried several things, but nothing worked and she ended up reinstalling OSX. That fixed the problem, but then she noticed she could no longer open DMG files. Accordingly, she tried to run Disk Utility but then found that it would always crash when trying to open.
She ran Disk Utility from the install disc, but nothing turned up. She also tried looking up several methods of fixing the DMG problem (deleting various files), but nothing's worked.
If I remember correctly, she also tried using the 10.3.9 combo updater some time ago, but that didn't help. We're actually not totally sure about that, so we're trying to reinstall the 10.3.9 combo updater, except for the fact that Apple has only made the file available as a DMG (which she obviously can't open).
So can anyone please help us get Disk Utility to stop crashing, and get those DMG files to open/mount? I have the crash logs but they're huge, so I'm not so sure if I should post them. Thanks everyone!
PS. I can open DMG files for her using MagicISO (I'm on a PC), but it's a bit of a pain transferring those larger files to her.
Powerbook Mac OS X (10.3.9)

What files did you try deleting? If you don't know what a file does or why you're messing around with it, you shouldn't; that's just asking for trouble.
Let's assume for the moment that you have a corrupted preferences file. To find out, go to Users/Library/Preferences and locate the com.apple.DiskUtility.plist file and drag it to the Desktop. Now relaunch Disk Utility and see if the problem continues. If not, then use Disk Utility to Repair Permissions, and then you can Trash the file on your Desktop.
You should also use your OS X install disc to boot the system and use Disk Utility to Repair Disk, to see if there are any problems. If it reports any errors that it can fix, keep running it until no more are reported.
If there's an error that it cannot fix, stop using your system immediately and make a backup of everything; then get a disk utility such as DiskWarrior to see if it can fix your drive. If your drive cannot be repaired, you will need to replace the internal drive and restore from your backup (if you have one).
Hope this helps,
Mulder
If my answer helped solve your problem, please consider awarding some points. Why Reward Points?
iMac G4 700Mhz Mac OS X (10.3.9)

How to obtain a disk image (dmg) for an app from the App Store

Is there anyway to obtain a disk image (dmg) for an app from the App Store?
I need to obtain an dmg for a small App that is only available from the App store, but I need to put it on a Snow Leopard machine that does not have App Strore installed (and cannot be upgraded further).

Any Mac with Snow Leopard can be updated to 10.6.8, which includes the MAS. Just download the 10.6.8 update combo and install it on that Mac.
Mac OS X v10.6.8 Update Combo v1.1
http://support.apple.com/kb/DL1399
You also do not need a dmg, just copy the app from one Mac to another. Unless the app has an installer MAS apps are simple drag & drop installation apps. If it has an installer drag & drop the installer and then run it on the Mac where you want the app.
Most MAS apps require a minimum of Mac OS X 10.6, and many require 10.6.6, 10.6.7, or 10.6.8 to run.

Dmg files won't mount, Disk Utility/Toast won't launch?

Hi folks,
I've just joined your fine community in search of help with my problem that I see on Google pops up on boards frequently... but no suggestions have helped me yet...
In a nutshell, if I download any dmg file, eg. Apple updaters, they won't open - the error dialogue is something like "failed to open, no mountable file system". This seems to be an underlying general error, as I also can't launch disk applications like Disk Utility and Toast. They just bounce in the dock and then quit.
I have:
- rerun the 10.4.4 combo installer
- done /sbin/fsck -yf at startup - all reported ok
- booted from and run Disk Warrior - all reported ok
- booted from and run Techtool Pro - all reported ok
- switched to another user account.
And the problem with dmg and Disk Utility/Toast persists! In all other respects, the Powerbook G3 (576mb/80gb) is running fine (apparently).
Hope someone can help
B
Powerbook Mac OS X (10.4.4)

I just went thru a simular problem. A couple of things to try.
Boot of your install disk and ignor the install window and open disk utility from the menu at the top. you are running off the o/s on the disk an not the hard drive. You can repair permissions and the Hard drive because you are now working off a different filesystem.
If that doesn't work do a rinstall from the install disk but when you get to the window that has an "options" button select it (you may have to) and instead of doing a full install. Uncheck all boxes. This way it does not reinstall fonts etc.
You will not lose any files or programs or have to reinstall them. You might have to reinstall devices that have special drivers like printers that came with an install disk etc.
You will revert back to the origional ver like 10.4.1. just go to apple update and let it do its thing.
Good luck

.dmg files won't mount

Ever snce installing 10.4.6 (I think) .dmg files downloaded with Safari (or Firefox) will not mount. If I double click the .dmg on the desktop, it goes away, does nothing and after a long time comes back with a dialogue box (I have never seen before) saying "Warning The following disk images failed to mount Reason: Device not configured"
Any ideas??!!

Have you got another harddrive or second partition to
which you can install OSX?
Nope. That's why I'm so unhappy.
Or try restarting and holding the cmd key ("apple"
key) and the s together until the system boots up in
UNIX - other keyboard short cuts here:
I already did a safe reboot. No change. I also tried using my other account on the Mac - no difference.
and run "f@*ed disk", well properly the "fsck"
command from that UNIX
prompt. See
http://docs.info.apple.com/article.html?artnum=106214
for more advice
I ran DiskUtility (both Repair Permissions and, from the install disk, Repair Disk), the disk is fine. The failure to mount, Device not configured issue remains.
I also used MainMenu to do the Daily, Weekly, and Monthly scripts. I haven't started cleaning cache files yet, with the exception of com.apple.kernelcaches and Extensions.kextcache, as recommended in another post.
I'm leaving the reinstall option until I have more time, and I'll just be mad at Apple for the poor update in the meantime.

.dmg files will not mount

i just bought a new intel imac. i've been having trouble with dmg files: when i open them wa warging comes up that says that the disk image failed to mount and the reason it gives is either codec overrun or not recognized. Every once in a while a file will work properly, but the vast majority of the time there is an error. The files that im trying to install are mostly updates; quicktime and an os x update. i was wondering if anyone else has had this problem and knows how to fix it.
thanks

Hi
I'm not sure what the answer to your problem is, but having also just purchased a new intel imac, I use software update. I know there is also the comboupdate (not that I really understand what that's all about!) but have to admit to having no problems using the Software Update option with my imac. No dmg's need mounting and (touch wood) everything has installed like a dream - so far!
BTW what's "wa warging" (shown in your message)?
Darren
iMac 20", 2GB RAM Mac OS X (10.4.6)

USB Flash Drive (with password protected Disk Image) copies files very slowly. Why?

I'm backing up some data onto a 32GB flash drive that I've put a password-protected Disk Image onto, and am copying this data into, but it is achingly slow. It's taking hours to copy just 500MB!
I have another 64MB flash drive that I have set up the same way, but this one copies files very quickly. I can't spot any difference between them in Disk Utility/System profiler.
For the record, the process I've used for bothe drives is reformatted to Mac OS Extended (Journaled), then created a new Disk Image onto each drive (just a bitsmaller than the maximum size of the drive to enable it to fit) with 128--bit encryption.
Does anyone have any idea why the 32GB drive would perform any differently? I am using the same USB port on my iMac for each drive, but am getting very different copying speeds. It's driving me nuts! Many thanks.

The drive seems to be working fine if I copy files onto it outside of the Disk Image file (there's about 200MB of free space left over after I added the DMG). So I can only deduce from that that it is something specifically to do with the DMG itself. Though, as mentioned, I compared the DMG on my (fast) 64GB stick and the DMG on this problematic (slow) 32GB stick in Disk Utility/System Profiler (and I originally set them up in an identical way, as far as I am aware), and they seem to be the same. But one is performing achingly slow. Even dropping a file into the mounted DMG takes a few minutes to even think about it. It's very odd.

Merge Disk Image Shadow Files

I've fallen into the habit of mounting disk images with a shadow file to save disk space on my laptop. I'd like to merge the shadow file back into the disk image in order to better preserve the changes I've made. After reading the man page for hdiutil it appeared as if this task would be as simple as performing a "convert," specifying the image file and the "ov" flag in the options. However, I continue to receive "Resource Busy" errors despite the image being unmounted. Am I attempting the impossible, or have I simply missed the solution to my problem? Would anyone with any knowledge about hdiutil be able to share some insight?

I think you can not use the option '-ov' with the verb 'convert'; convert into a new disk image will work
hdiutil convert old.dmg -format xxx -o new.dmg -shadow shadowfile
After checking that new.dmg is OK, you may remove old.dmg. Or do you mean you don't have enough disk space to do this?

Disk Imaging, DMG, Zip, COmpressing

Hi,
I just downloaded a cool free software called FreeDMG which creates disk images. The problem is I'm not quite sure what it's used for! I know it creates .dmg files out of folders, i.e. creates a disk image, but what could I use this for? I know most program developers must use it to create the .dmg versions of their programs, but for a regular user....
Is it a compression tool? Can I use it to reduce the size of some of my file folders for back up purposes? If not, what for?
By the way are there other OS X solutions for compressing large file folders and reduce space occupied by a back up solution?
thanks
J

Wade,
I'm a pretty comfortable osx user and I'm targetting you with this question as you seem to have a lot of posts and that nifty developer icon. I'm well aware of how 10.4 pulled out from having stuffit in their systems and allowed for creation of native zip archives via Create Archive in the finder itself. I'm glad to have found out in my reading that zip natively now supports all resource forks as a designer using old school fonts.
Here are some of my concerns for my workflow in prepping for archving work and looking towards a compatible future:
-Is there a way to tweak default zip compressions settings to getting smaller archives?
-What about RAR, I'm in the midst of trying to figure out if RAR has any support for resources forks often found in font files. An additional benefit that I see in RAR is the parity factor on windows boxes. (I'm aware of MacParDeluxe and Split and Concat as well) But essentially it would be great to cut down usage of programs to archive to say.. ONE. I'm not a windows user but I've seen some windows users workflows for archiving their work and they can create archivable, "paritied" segments of their projects, and set multiple to go and let their computers do compressing while they sleep.
-which brings me to my next point: I'm a little peeved with my experience at DMG, ZIP, and STUFFIT. Here's why, keeping in mind, I'd love not to have to drop to command line to accomplish these tasks: Compress/decompress multiple folders of projects as separate archives simultaneously, maintain resource forks for legacy files-just in case.
DMG: *.dmg's are great, yet I believe I've found a issue with them... try mounting 3-4dmg's on your desktop from a portable drive each dmg having a couple hundred files in them (images often in my case). Then grab all those mounted dmgs to a local drive. The copy begins with counting... and disappears at times, no warning... and incomplete... I've logged this on macintouch with no response and have tried this with similar results on numerous pristine systems.
Also, in my experience in using a very nice program like DropDMG it does a GREAT job of creating dmgs for a folder at a time... but when attempting to set even two to go, one will error out.
ZIP: Once again, happy to see that I can now preserve resource forks natively in OSX through "Creative Archive..." Bummed when I try on occasion to expand a folder of 24 zip archives at once (Apple+A, Apple+O in a folder) and occasionally they start erroring out... (seems to happen with fonts a lot in my experience). And again/addtionally, any way to tap into compression settings.
STUFFIT: Aladdin...sigh They rose, they fell... OSX x'ed them, they seem to be better... but not quite. IMPRESSIVE compression with the stuffitX archives, but boy, they really start up the turbines on my machine and not to forget lets multitask the mac... I'd love to rightclick one folder after another and set 10 project folders to go overnight stuffing away.. but the instant proceed on the second archive while the first is going... i notice the first one either freezes or the progress bar stops givig me any accurate visual feedback.
So Wade, perhaps I've been going about my archiving all wrong, but I do know some of my concerns are well grounded and as I'd love to set my system to crunch away while I sleep without a concern in the world at night, I really don't think I need to be baby sitting a program while archiving or unarching and I'd love to feel secure in whatever format I choose for archiving/future forecasting. Please do share any thoughts suggestions you have on all this.
regards,
erg8t

IBook G3 - DMG files won't mount!

I recently acquired an iBook G3 Clamshell (366 mhz) with Tiger (10.4.11) installed on it.
I can't seem to download dmg files, as I get a 'Mounting Failed' error. I have tried creating a new admin, no luck. Unfortunately, the computer didn't come with the Tiger install cd's. I have also tried verifying and repairing the disk permissions with no luck.
Any help would be greatly appreciated. Thank you!

Well, now I can't get it to safe boot. I've done it before, no problem but it won't work, now. I restarted, holding the Shift key, and it never would start after 10 minutes or so but the fan just kept getting louder and louder. I tried it 3 times. Then I tried booting from the Disk Warrior CD and it took 3 tries before it finally booted off the CD—I would hold the C key and it would just sit there and not start up and all of the sudden the restart gong would go off, I'd still hold the C key and it did this 3 times before it finally started from the Disk Warrior CD.
Did you want me to try moving those files off to the desktop even though I can't restart in safe boot or run disk utility?
I'm gonna call it a night for now. Maybe I can try the safe boot again tomorrow. How long do you think I should hold down the shift key before I give up?
Thanks again!

.DMG files won't mount on desktop nor will my iPods

My iPod classic won't mount on my desktop, nor can I get the iTunes .dmg file (or any .dmg file for that matter) to mount on my desktop. My iPod has worked fine for years. Now it won't mount on my desktop but it'll charge just fine. It used to automatically launch iTunes when I plugged it into the USB port, but now it won't. And when I launch iTunes, iTunes doesn't recognize it at all so I can't sync. I've tried restarting my computer, upgrading iTunes, switching USB ports and restoring my iPod. Still nothing. I don't think the problem is with my iPod, I think it's my computer. Because I just bought a brand new iPod Shuffle yesterday (because I thought my old iPod was dead) and the brand new Shuffle won't mount on my desktop either and won't automatically launch iTunes and iTunes doesn't recognize it at all to sync it. (I checked and my iTunes is up-to-date.)

Well, now I can't get it to safe boot. I've done it before, no problem but it won't work, now. I restarted, holding the Shift key, and it never would start after 10 minutes or so but the fan just kept getting louder and louder. I tried it 3 times. Then I tried booting from the Disk Warrior CD and it took 3 tries before it finally booted off the CD—I would hold the C key and it would just sit there and not start up and all of the sudden the restart gong would go off, I'd still hold the C key and it did this 3 times before it finally started from the Disk Warrior CD.
Did you want me to try moving those files off to the desktop even though I can't restart in safe boot or run disk utility?
I'm gonna call it a night for now. Maybe I can try the safe boot again tomorrow. How long do you think I should hold down the shift key before I give up?
Thanks again!

CDs and dmg files failing to mount on an eMac; any suggestions?

Dear all,
I have not posted here before and hope someone can assist please; I'm a long-time Apple user, having started with the Apple II and currently owning an iMac G5 and PowerBook G4.
Having obtained a G4 eMac, I discovered a serious software/hardware for which I can't find a solution. It is running OS X.2.8 which has an issue mounting .dmg and CDs. When I attempt to mount .dmg files, it reports the error message:
"FILE NAME failed to mount due to error 95. (no mountable file systems)"
All CDs will not appear on the desktop with the exception of the Apple Hardware Test CD. They do appear through Disk Utility but can't be mounted. I have tried apps such as "Mount" without success.
Apple has recognised this problem:
http://docs.info.apple.com/article.html?artnum=106345
http://docs.info.apple.com/article.html?artnum=107288
but none of the suggested remedies have worked for me. Various forums suggest solutions, a summary of which may be found here:
http://www.macattorney.com/tutorial.html#anchor-diskimage
but none worked.
I have also tried holding the "c" key with the Install CD but it won't mount.
Any suggestions please? I can boot with System 9 - as a last resort would it be possible to then delete key files from the OS X's "System" folder, following which I might be able to boot from the "Install" CD?
Many thanks,
Peter

They sometimes say you're better helping yourself!
I seem to have solved this after many hours of experimentation. I decided to hook up my iMac G5 (running 10.4.11) via a firewire cable. Having started the iMac, I followed the instructions for a target disk, connected the cable and fired up the eMac (hold "T" etc). Within minutes the eMac with its inserted CD could be seen on my iMac's desktop. However, I now needed to see if it worked the other way around - if I could somehow boot up with the eMac and use the iMac as the target disk, putting the CD into the iMac.
The eMac read the iMac's drive but unfortunately I could not see the inserted CD. Having then turned off the iMac, I left the firewire cable plugged in and then inserted the eMac's Install disk - to my great surprise the Install disk suddenly appeared on the eMac's desktop for the first time! I clicked the Installer which then announced it would start up from the CD. It duly did - and I managed to revert back to System 10.2, rather than the problematic Apple upgrade 10.2.8 which had been installed (and apparently caused the problems).
I'm trying to obtain a copy of 10.3 Panther, simply to run the excellent Elgato EyeTV.
Fingers crossed!
PJD.

.dmg files no longer open in the finder

I just did an archive and reinstall (to solve some unrelated problems). Most things seem fine, but now .dmg files show up on the desktop without any icon, and when I double click them they open Disk Utility instead of mounting in the finder.
It's possible to mount them from within disk utility by selecting the .dmg file and clicking on "open" ... but this is an odd bunch of extra steps, and it seems like something's wrong.
in get info I tried to change the default app to the Finder, but it wouldn't let me.
I've repaired permissions, rebuilt the directory with disk warrior, restarted, etc. .. no luck.
any thoughts?

The application to choose in "get info" >>"open with" is "DiskImageMounter".
-mj
[email protected]

Disk Image/Original File (iDVD 5)

I just finished saving a iDVD Project as a Disk Image. I know you can move the disk image file to another computer for burning. Also you can create multiple copies of a DVD from a disk image.
This leads up to my question(s)...
When you have created a disk image, What should you do with the original file if you have really no use for it?
Do I need to keep the original file for some reason?
Should I trashed the original file to save hard disk space?
Thanks in Advance!
Imac G5 Mac OS X (10.3.7)

Susan, just as a point of protocol, new questions ought to be posted as new topics. Anyway, that said...
Ths disc image is a file, like any other file. It's just big. So to get it to the other Mac, either use the network (I'm assuming the machines are networked!): Click the network icon in the finder sidebar, click the host name of the other Mac in the finder window, and go through the steps of connecting as a remote user. (Depending on how the network is structured you may have to poke through some folders to find the other machine.) Once you have the remote share mounted, it's just a drag and drop Finder copy.
Your alternative is to plug in an external firewire or USB disk, copy it there, carry it over to the other machine, and copy again.
On the other machine, you burn the disc image with either Disk Utility or Toast. Start up Disk Utility, and select File->Open Disc Image. Then select the disc image in Disk Utility's sidebar and click the burn button. A similar procedure applies with Toast - select the disc copy mode and then select the disc image option.
- Andy
PowerMac G5 dual 2.5 Mac OS X (10.4.5)

Disk Images won't create or mount after 10.4.9

Since installing 10.4.9, my old disk images of CD's would not mount and I cannot create new images that mount. I get a unknown (bad) filesystem error.

Now with 10.4.9 update, be sure you have tried everything from the "Disk image you are opening may be damaged" article you had above!
http://docs.info.apple.com/article.html?artnum=305111
Look again at the "Solution"
1. Make a new image in Disk Utility and copy the original files to the new image.
2. Discard the original, affected image.
3. As a precaution, open (mount) the new image, open Disk Utility, and repair the new image. Continue to repair until no issues are found.
Go to Disk "Utility" and select "New Image" then "New Folder" and copy original file to the new image (item #1) then discard the old (item #2) and repair new image (item #3)
Dennis

Disk Image (.dmg) files no longer mount

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