OS X V10.7 Lion :: Won't Mount DMG Files Unless In Safe Mode
May 7, 2012
If I try to mount almost any DMG file I just get an error message saying that there is no mountable file system. I know that these are not corrupt dmg files because these are ones that I have mounted before, it affects almost every single one and more importantly if I reboot in Safe Mode every single one mounts perfectly.Â
Clearly then something is running in normal mode that is preventing dmg's from mounting but I don't know how to find out what. I went to System Properties>User & Groups>Login Items and removed everything that was there but that was just iTunes Helper and something called WDC something or other which was unchecked anyway and is just a utility that controls my external hard drives. With everything removed and rebooted still DMG files won't mount.Â
Safe Mode = DMG's mount
Normal Mode = DMG's won't mount.Â
how I can find out what is causing this problem and/or how to fix it as it's annoying as **** and preventing me from easily updating software.
Info:
iMac, Mac OS X (10.7.3), 3.1Ghz Quad-Core Intel core i5
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Apr 13, 2012
Been having probs w Mac Pro w Lion seeming to hang on shutdown/restart. Have 'reopen windows' unchecked in prefs.  Was able to run through safe mode boot once but now seems to hang about 20% in everytime.  Have had to do shutdowns w power button (I hate that) or /by ctrl-option-command-esc Boot single user run rack -fy says 'apparently ok'Mount -uw / reports removed 10 orphaned or unlinked files and 10 directories?
Info:
Mac Pro, 2xDual2.66, 4GB, GeForce 7300 GT, 23" Apple LCD, Mac OS X (10.5), G4 Cube, Rev A/C iMac, NeXTCube,PwrMac8500,Quadras,SE30s,MacPlus
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May 15, 2012
I've tried the safe boot but seems it is not working. I do need to recover my files.
Info:
MacBook Pro, Mac OS X (10.6.8)
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Mar 8, 2012
I'm getting the gray screen when I startup. I tried using the install disc to repair the utility, but it said it cannot be repaired. I had to use a plug-in mouse instead of my normal wireless mouse to get the startup disc out on a restart. I want to now startup in safe mode, but holding down shift during startup with my wireless keyboard doesn't work. Do I need to have a plug-in type keyboard for this function to work? Can you backup files using safemode?
Info:
iMac, Mac OS X (10.6.3)
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Apr 11, 2012
The only old discussion from 2007 suggests up to 30 minutes. It seems strange that it would take so long. Has anyone tried this more recently on a PowerMac G5 using Mac OS X 10.7?
Info:
PowerMac, Mac OS X (10.7.3)
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Apr 29, 2012
I am running OSX Lion latest version on my Macbook Pro 4,1 and can't get the thing to boot from any source. Always get's stuck at the grey screen with apple logo. Have tried all the following...
- Straight Boot (power on)
- Boot via Recovery HD (hold option on bootup then select)
- Boot via Safe Mode (Holding Shift on bootup)
- Boot via Safe Mode Verbose (Shift, Command, V)
- Boot via bootable Lion USB Key (Hold option, and choose the USB drive - not the same USB key works on my other macbook pro)
On every one (except verbose) it just get's stuck on the grey screen with spinning timer thingy. I have done PVRAM reset, SMC reset and have reseated the RAM and all to no avail. I'm pretty sure the problem was caused by removing battery at wrong time (device not responding after sleep mode started and I plugged in power - should have been more patient!)
I have a Time Machine backup but it's a bit older than I thought and very much want to get my newer photos off it before rebuilding - not that Time Machine would work in current state anyway. So what are my remaining options? Will I have to open it up and remove the HD as next step or is there anything else left to try? Can I remove the HD and connect it via a USB caddy to my existing Mac to recover info (hard drive spins and sounds ok to me)?
Info:
MacBook Pro, Mac OS X (10.7.3)
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May 9, 2012
Unable to boot into safe mode. Not hearing chime. Holding shift key not working.
Info:Mac Pro, Mac OS X (10.7.3)
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May 12, 2012
My 2011 17" MBP won't with OS X Lion won't start up in safe mode...
Info:MacBookPro, Mac OS X (10.7.4), 2011 17" MBP with 8 Gigs of Ram
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May 12, 2012
While I have no problem booting into the Startup Manager using the command key with my wireless keyboard I'm finding it impossible to boot into Safe Mode using the option key.
Info:
Mac OS X (10.7.4), OWC Mercury Elite Ext Drive
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Mar 14, 2012
After installation update Mac OS Lion 10.7.3, my macbook pro starts allways en safe mode. How can I resolve this ?
Info:
iPod touch, Mac OS X (10.6.3)
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May 15, 2012
A few days ago I updated to Lion 10.7 with which I have had no problem. A day later I installed Moneywiz, Skydrive for mac and did some updates of various software. Since then, if starting from cold, my imac starts in safe mode. I get the start-up sound; then the white screen with Apple logo; then the spinning sun; then the progress bar; then the grey screen with "safe mode" in the top right and user log-in (although I don't have log-in set in my options). Once running in safe mode I can shut-down and re-start; or just re-start and it will load properly. I have tried starting with mouse/keyboard on/off. Is this a Lion thing or what.
Info:
iMac (21.5-inch Mid 2010), Mac OS X (10.7.4)
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Jun 17, 2012
I was using my macbook pro and suddenly it started crashing... I tried to restart it but it would take too much time, so i pushed the power button and powered it off. When i started my mac i got a kernel panic. *** is going on ? I restarted it 7 times, tried to enter safe mode holding the shift key but nothing
Info:
MacBook
Pro, Mac OS X (10.7.4)
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Jun 29, 2012
Is it better to boot in Safe Mode in Lion to repair permissions?
Info:
iMac, Mac OS X (10.7.3), iMac Late 2009
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Jun 5, 2012
my macbook pro today started to freeze at logo scrren. I tried to start it up in both safe and recovery modes but it doesn't work either. I got the system to start in safe mode only once and the scrren looked like in the attached image.When I tried printing the screen instead of taking a photo with my mobile, the image appeared to be normal (without those noisy rectangles), but it wasnt. Then itried restarting but it's been impossible. As i said i tried booting on safe and recovery modes but the circle below the apple logo appèars and then it freezes again. I read about aproblem with the graphic card similar to mine in earlier models, I don`t know if it is the same problem.Â
Info:
MacBook Pro (15-inch Late 2008), Mac OS X (10.7.4), 9400M/9600MGT
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Jul 1, 2014
Ok... So, I have an extremely slow Time Machine backup. Many people do. I've gone through the motions and tried to resolve the issue by doing the suggested restart in Safe Mode. I even followed some of the other tips that are on this string: slow time machine backupÂ
Nothing has worked. I don't use Norton Symantec but I didn't the Norton Remove script through the Console already. I don't run any anti-virus software. Â
This started when I was backing up to at Time Capsule. I backed up to the TC for years before this started. I then moved to backing up (started fresh) to a external HD connected via USB.Â
I have a 2010 Mac Mini with OS X 10.9 (Latest Version)Â
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Jul 6, 2010
I have a 15" mbp with 10.6 Intel core duo, 4gb ram with a boot camp and ubuntu partition through parallels. The other day I was installing xcode from apple's website, which failed 3 times after downloading saying the package couldn't be expanded. I left my computer for a while and came back where i then had to log in again. it rejected my password numerous time (i'm positive it was correct). when i restarted my computer i got a kernal panic screen when the apple logo came up. it told me to restart the computer which i did. didn't work. i restarted with the osx cd to use the disk utility. when it checked the drive it found a bunch of errors, which i then tried to correct. it went for a couple minutes then told me they couldn't be fixed and i should try to back up my data and reinstall osx. i don't know how to back up my hard drive when i can't log into my account. i've tried to boot in target disk mode and copy some files that way, but the only disk the other computer sees is my windows partition- no mac partition.
i've also tried these, none of these have worked: restarting in safe mode resetting the ram and pram booting with different sticks of ram all result in a kernal panic.
my windows partition still works fine though (as much as i hate to say it) the only things I really care about on my computer are my files from school and my itunes library. is there any way i can get these files off my computer?
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Sep 3, 2014
My iMac24" can't booting in normal mode, but booing in safe mode only.
how to boot up in normal mode. If I restart the system, it is showing the apple logo and not going to Finder.
Info:
iMac, maverics
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Aug 21, 2014
I'm not sure what to do. I haven't tried resetting NVRAM/PRAM or the PMU/SMC, but are there other options I can try besides those?
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Jun 5, 2014
My Mac Pro main boot drive us encrypted. I booted into recovery mode the other day & it wouldn't let me boot back o my main drive. Now upon start up I can't enter either recovery mode nor safe mode nor chose the main drive to boot from. I'm absolutely stymied in what to do.
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Apr 6, 2012
I have been unable to restart me computer after a software update (White screen/apple logo/spinning wheel continuously). I have tried to start up in safe mode (holding down shift key) but it hasn't worked.
Info:
MacBook, Mac OS X (10.4.6)
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Nov 30, 2008
my computer wont run in regular mode. The problem occurred when I was changing my resolution and I pressed the wrong one. The screen went blank so I restarted, then the screen turned black after the apple logo. Now I can only run in safe boot. Is there any way to change the res. for the regular boot in the safe boo mode?
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Jun 5, 2012
i cannot mount .dmg files. I am running the newest version of lion and on my friends mac winch is exactly the same as mine he can open the .dmg?Â
Info:
MacBook Pro, Mac OS X (10.7.4)
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Apr 18, 2012
iMac 27, 2.8 Quad Core, 16 GB RAM, 3 TB HD running 10.7.3Â lead in > Lately I am having trouble with Aperture 3.2.3 who doesn't let me make some image adjustments "out of the blue". To correct this I usially have to reinstall Aperture from scratch. Trying to do so made me find out that I can't execute the Aperture trial 3.1 dmg file or any other dmg file on my iMac. When i double klick on a dmg file it will flash once and then just sit there doing nothing. The dmg "Get Info" window shows that the file is associated with the DiskImageMounter.app as supposed to. I have no glue why it won't execute these files and open the installer. I have tried everything from executing with disk image to repair permissions etc, etc. and I have read all forums and threats I could find but to no avail. Â
The only way to fix this is reinstalling OSX 10.7.3. After reinstalling Lion everything is just fine - for a while. I am able to reinstall aperture with the trial version dmg file. All other dmg files will also execute. For now I was able to work with my reinstalled system for the last seven days with no glitches, but last night same problem occured as described earlier. I have also checked my harddrive with disk utility and onyx. Both apps say HD is just fine.
Info:
iMac, Mac OS X (10.7.2), Quad Core 2.8, 27, 8GB RAM
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Sep 25, 2009
Just wondering.
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May 17, 2010
I have a 08 MacBook pro (not unibody) and it is now not booting up. I recently installed a Hitachi 500gb hard drive on the computer and restored through time machine and it worked fine for about 2 weeks and now wont boot and I'm wondering if its probably the hard drive. When I click power the light on the front of the computer will come on and it will sound like it is about to boot then a clicking noise seems to come from the computer and it instantly shuts off. I have gotten it to turn on a couple times since it happened by slamming the comp on the bed then for some reason it will work but as soon as I shut it, it wont turnback on. Any ideas?
Oh and PS the screen never comes on and can't boot in safe mode.
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Jun 22, 2010
I was getting a error code 36 on my mac so I decided to try to boot up in safe mode now my macbook pro will not stop trying to boot to safe mode. I am on snow leopard.
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May 3, 2012
i need help cause my brother logged in to the guest mode and since then it goes to guest mode automatically with out giving me the chance to log in the only way i can get back in to my account i have to hold the shift key down at boot, yet when i let the mac boot up normal way it goes straight to that safari web browser.
Info:
MacBookPro, iOS 5.1
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Apr 27, 2008
I need some pictures from my g4 digital audio onto my macbook, so I started the power mac up in target disk mode with the firewire cable attached, and it didn't mount. I have restarted both computers, and still the disks don't show up in disk utility. Could I have a bad cable, or is something else the problem?
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Oct 8, 2010
I have a 21.5 inch iMac and am running Snow Leopard. I am familiar with Safe Mode and I understand that it does a disk check and repair and also does some cache clearing during a startup process that allows the user to startup into a system where certain kernel extensions, etc, are disabled to allow for trouble shooting. Then the user can do a restart and end up back in normal mode.
My question is whether starting up into Safe Mode could prove beneficial as some sort of routine maintenance?
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Feb 12, 2008
Leopoard 10.5.2 - Quad Core Mac Pro.
I'm trying to start up in safe mode, per a recommendation from Objective Development, for a Little Snitch upgrade. I'm following these steps perfectly, and I see no indication that I'm running in safe mode. Of course, I've never seen safe mode, so I'm not sure what it looks like, but I'm guessing I ain't in it because I never see the "Safe boot at the login window".
Quote:
To start up into Safe Mode, do this:
1. Be sure the computer is shut down.
2. Press the power button.
3. Immediately after you hear the startup tone, press and hold the Shift key (the Shift key should be held as soon as possible after the startup tone but not before).
4. Release the Shift key when you see the gray Apple and the spinning gear. Please be patient, booting in Safe Mode may take some while.
During the startup you will see "Safe Boot" on the login window, which appears even if you normally log in automatically.
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