12 Replies Latest reply: Feb 5, 2015 6:53 AM by Mark Grodzki
danaenomidi Level 1 Level 1 (0 points)

just bought a new macbook pro  with Mac OS X 10.7

 

i downloaded some app's like skype , all in .dmg format but i cant install them/use them..

 

 

every try to make use of .dmg files , fail!

 

any idea about what's going wrong and what to do?

 

thanks


Mac OS X (10.7)
  • Kappy Level 10 Level 10 (247,160 points)

    What exactly are you doing?

  • danaenomidi Level 1 Level 1 (0 points)

    1.first try by double left click (default open with is DiskImageMounter) and i get "couldn't be opened"  with reason not recognized

     

    2.second open Disk Utility drag and drop name.dmg , select it , hit open button and get error mesage "unable to attach (not recognized)"

     

    3. tried these commands:

    sudo launchctl unload /System/Library/LaunchDaemons/com.apple.kextd.plist

    sudo rm /System/Library/Caches/com.apple.kext.caches/Startup/kernelcache

    sudo launchctl load /System/Library/LaunchDaemons/com.apple.kextd.plist

     

    and retry disk utility and disk image mounter and nothing different happened

     

    4. found many options here, didnt try cause they look scary to do with a new pc that is supposed to dont have problem like these described:

     

    Procedure A.....

    1. Navigate to and open.../Applications/Utilities/Disk Utility

    2. Click on "Macintosh HD" in upper left, then press "Repair Permissions" .

    3. If that does not solve the problem, navigate to /System/Library and delete...

    Extensions.kextcache

    Extensions.mkext

    4. Navigate to /System/Library/Caches and delete the folder...

    com.apple.kernelcaches

    5. Restart and see if the problem still exist.

    6. If that does not fix the problem, go to ~/Library/Preferences and delete..

    Com.apple.LaunchServices.plist

    7. Restart and see if the problem still exist.


    Procedure B...

    1. Navigate to .... /System/Library/CoreServices/DiskImageMounter .app

    2. Drag the stubborn .dmg file onto DiskImageMounter .app


    Procedure C...

    1. Boot off your install CD and run Disk Utility to repair the filesystem.

    2. Try to mount a dmg file using the unix hdiutil utility.

    Procedure D....

    Assuming that the disk image is on your desktop, try these Terminal commands:

    hdiutil mount filename.dmg <enter>

    where filename.dmg is the name of the disk image.

    If there are an spaces in the name, use this form .....

    hdiutil mount "file name.dmg" <enter>


    Procedure E...

    1. Navigate and open .... /Applications/Utilities/Disk Utility

    2. If the .dmg file does not appear in the lower left pane, drag that stubborn onto the lower left pane.

    3. Select that file ......(Command + Open) ..... The image file will be opened and placed on the desktop... Move that .dmg file to the Trash..So if you wish to add that file to your Archive for later usage, remove it from the Trash.


    ProcedureF..

    Download the free ....

    Mount.app (http://mount.houchin.us/) software instead of the integral Mac OS X DiskImageMounter program within OS X. The Mount.app software which downloaded instantly then opened the.dmg file in question without hesitation.

     

     

     

     

     

     

    so? any idea?

     

    thanks for the reply

  • Kappy Level 10 Level 10 (247,160 points)

    If you double-click on a .dmg file and it cannot be mounted that means the download is defective. It could also mean your hard drive is corrupted in some way that the saved .dmg file becomes corrupted.

     

    At the extreme you may have a defective installation of Lion. Reinstalling Lion may then help.

     

    For a corrupted drive you can boot to the Recovery HD and use Disk Utility to repair the hard drive (not Verify, but Repair.)

  • danaenomidi Level 1 Level 1 (0 points)

    1. "hard drive is corrupted" you mean the hard drive of the laptop?

     

    2. my macbook doesn't come with a cd , and i am a new user of mac. How can i reinstall Lion ? (without cd..)

     

    3. can you explain the 3rd option you mentioned? First you are refering to a corrupted drive of laptop or the image file dmg? Where can i find recovery HD?

  • Kappy Level 10 Level 10 (247,160 points)

    1. Yes.

     

    3. Well, there are two aspects: corruption of the hard drive; or corruption of the .dmg file. For the latter you may try re-downloading the file. For the former you need to try repairing the hard drive.

     

    Repair the Hard Drive - Lion

     

    Boot from your Lion Recovery HD. When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the main menu. Select Restart from the Apple menu.

     

    Boot to the Recovery HD:

     

    Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.

     

    2. To reinstall Lion:

     

    Reinstalling Lion Without the Installer

     

    Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alterhatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.

     

    Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.

     

    When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.

     

    Reinstall Lion: Select Reinstall Lion and click on the Continue button.

     

    On your computer Lion reinstalls via Internet Recovery, so be sure your internet connection is functioning.

  • danaenomidi Level 1 Level 1 (0 points)

    i tried to download 2-3 different files for more than one times each. Same results each time

     

    so I bet it's not the fdmg files?

     

    if i use another browser than safari, is there a chance to get new results?

  • Kappy Level 10 Level 10 (247,160 points)

    Well, anything's possible. It can't hurt to try another browser.

  • danaenomidi Level 1 Level 1 (0 points)

    tried to dl chrome but this is also dmg....

     

     

    is there a way to find a browser not in .dmg format?

  • Kappy Level 10 Level 10 (247,160 points)

    I doubt it.

  • shardey Level 1 Level 1 (20 points)

    Download it on another computer and extract it onto a flash drive and drag and drop onto yours.

  • annfromcenterville Level 1 Level 1 (0 points)

    I too have had this same issue using Snow Leopard on a MacBook Pro.  Happens with .zip files as well using either Safari or Firefox (haven't tried other browsers).  The issue occurs with 95% of all .dmg/.zip files I try downloading, including ones made by Apple such as Itunes.  The only solution I've found is to plug directly into my modem and/or router so I'm guessing it's a problem with the Macbook wireless card.  Try plugging in direct and see if that helps

  • Mark Grodzki Level 1 Level 1 (0 points)

    Why am I having this issue now and all the posts I find on this are from 2011? I am on 10.10.1