Mountain Lion won't open dmg's in installation packages

Since installing Mountain Lion, installation packages can't seem to open and mount dmg's automatically during installation.
Symptoms: Ran MacUpdate Desktop and ran Adobe Update.  Found a number of Mac apps that needed to be updated.  Files that were sent as ZIP archives opened and instlled fine.  Files that were sent as PKG or DMG failed to install (mounted image appeared for less than a second then disappeared from desktop and I received a 'failed to install' error message).  I went into the DOWNLOADS folder or into the appropriate LIBRARY folders and found the downloaded installation files and manually opened the DMG or PIMA files so the images were all mounted and then ran the installation program (or simply found the app and dragged it into the APPLICATIONS folder) and everything installed fine.
Is this something that is a known problem and, more importantly, has a fix?
Sandy

You could try adjusting the Gatekeeper settings.
System Preferences > Security & Privacy >
You may have to click the padlock and enter your admin password here. Once you do you should see the "Allow application downloaded from: - change the selection to - Anywhere"
You can also keep the settings as is and just Command and Click the DMG from Finder, should do the same trick.
Hope that helps.
a.

Similar Messages

  • New late 2012 iMac with Mountain Lion - won't open Reader Library

    Everything transferred from my old iMac (2009) to my new iMav (late 2012), except for the READER LIBRARY.  It won't open on the desktop, and it won't open or recognize my Sony e-reader.

    I'm about to attempt the same thing -- migrate everything from my old iMac (running 10.6.8) to a brand-new iMac (running Mountain Lion). 
    Still using FCP7, with no intention of switching to FCP X. 
    Should Migration Assistant work for me?  Would updating my old iMac to Mountain Lion first make a difference?  (I've already purchased it for my laptop, just haven't used it on my iMac).

  • I got a new acer pc with Win7 64-bit and itunes download won't open, it says 'This installation package could not be opened. Verify that the package exists and that you can access it, or contact the application vendor to verify that this is a valid win'

    I've tried to download Itunes and itunes for 64-bit using mozilla firefox and internet explorer, even deleted the browsing history and closed and tried to dowload again and tried download quicktime separately, but nothing seems to work. 

    Try right clicking on the installer and select run as administrator.

  • Mountain Lion won't allow me to save photos from Mail directly to iPhoto (as you could in all other recent OSX).  Tried opening iPhoto and then click/drag each photo onto iPhoto icon on dock (as Help instructed) but the photo will not drag.  Suggestions?

    Mountain Lion won't allow me to save photos from Mail directly to iPhoto (as you could in all other recent OSX).  Tried opening iPhoto and then click/drag each photo onto iPhoto icon on dock (as Help instructed) but the photo will not drag.  Suggestions?

    I have real a lot of posts that say to click Command+Option while opening iPhoto and this will open the Photo Library Repair window, but... this is not happening.
    Be sure you're holding the correct keys and that you're holding them long enough. Depress them before clicking on iPhoto and don't let go until the menu shows up.
    If you don't want to lose those photos, make a back up now. Hopefully it's not too late.

  • After upgrading to Mountain Lion, I cannot open my File Maker Pro files. Can I use Numbers to open these files?

    After upgrading to Mountain Lion, I cannot open my File Maker Pro files. Can I use Numbers to open these files?

    Numbers is a spreadsheet program and FileMaker is a database program, so you probably can't use Numbers to open them unless you had first exported them from FileMaker in a spreadsheet-compatible format.
    If you upgraded from 10.6 Snow Leopard or earlier and your old copy of FileMaker won't open anymore, it might be a PowerPC application that is not compatible with 10.7 and later. If that is the case, to work with your FileMaker files you should upgrade your copy of FileMaker to the latest version, which seems to be FileMaker 12.

  • Cannot install Mountain Lion - my iPhoto won't quit and Mountain Lion won't let me do a force quit

    I'm trying to upgrade to Mountain Lion but when it ries to quit all programmes to install my iPhoto won't quit as albums are being sync'd.  I try to stop and quit but it won't.  I then try to force a quit and Mountain Lion won't let it.  help!

    if you don't mind interrupting the album sync, you can do a hard shutdown of the mac by pressing and holding the power button down for 10 seconds to make sure it's all the way off.
    you can then do SMC reset which is described in the following article:
    http://support.apple.com/kb/HT3964
    after doing this turn on the mac, click on the black apple then force quit and make sure all apps are closed
    open app store and try again to install the mountain lion

  • HT204347 Mountain Lion won't install on my laptop. I'm trying a fresh install

    Mountain Lion won't install on my laptop. I'm trying a fresh install

    Which OS X is currently installed?
    Make sure your Mac meets Mountain Lion requirements > System requirements for OS X Mountain Lion

  • Mountain Lion won't install on 10.7.4. Suggestion from Apple is to completely erase harddisk and install Leopard Snow Leopard Mountain Lion. Is there no other way to install Mountain Lion

    Mountain Lion won't install on 10.7.4. Suggestion from Apple is to completely erase the harddisk and install Leopard > Snow Leopard > Mountain Lion.
    Is there no other way to install Mountain Lion?

    I tried and failed for several hours to install Mountain Lion, and was repeatedly getting the "Recovery System" cannot be created error.  I tried all the tricks: resizing the drive partition, booting from an external boot drive, all to no avail.  After reading other users struggling with the same issue, I had determined it to be a boot camp drive error.  However, I didn't want to have to erase and begin anew when I came upon a possible solution.  I had long ago renamed my boot camp drive with a "." (".windows" for me) in order to avoid having the partition show up on my desktop.  So, I boot into windows and renamed the c: drive without the "." ("windows"), and reboot into os x.  The install then went off without a hitch.  I hope this will be helpful for others struggling with this issue that may have renamed their boot camp drives in a similar manner.

  • Mountain Lion freezes when opening pdf file on preview

    Mountain Lion freezes when opening pdf file on preview. I have to power down my Mac

    Mountain Lion freezes when opening pdf file on preview. I have to power down my Mac

  • Mail created w/ mountain Lion will not open in SL10.6.8, or OS X yosemite.

    Mail created w/ mountain Lion will not open in SL10.6.8, or OS X yosemite.  How can I convert it to open?

    After a second call to AppleCare, they had advised me differently than before.  Once they found out that my personal computer has Mac OS X Lion installed from the App Store, they suggested I simply upgrade my parents computer to Lion.
    So, I used my download from the App Store and upgraded.  It went smoothly, but Mail still will not open properly.  And instead of the original error message, it comes up with this:
    "Check with your developer to make sure Mail can work with your version of Mac OS X.  You may need to reinstall the application.  Check if there are any updates available for the application."
    How can I re-install just Mail?  A startup disk is not accessible for me right now.  Can I download the latest version of Mail and install it from the Apple.com website?

  • HT4245 my iMessage on my macbook pro mountain lion won't work.

    this is a very frustrating problem
    my iMessage on my macbook pro mountain lion won't work.
    it keeps on saying that ive entered the wrong passcode.
    i even have my firewall turned off
    plz help

    Ok...
    So I bought my MacBook Pro second hand, and it came with no installation discs, but I got Mountain Lion and had it installed and decided to back it up to a disc in case of this scenario. I followed some instructions to make a bootable disc and used it to install a fresh copy of Mountain Lion back when I first got it.
    My problem is that without the boot partition of my MacBook's hard drive it doesn't seem to want to boot the disc.
    Since I didn't want to buy a disc and I don't have another MacBook or know anyone near me that does, I decided to download a hackintosh iso and use it along with my other laptop to install iPC 10.5.6....this installed successfully and my hopes were that my MacBook would be able to boot it, so I reinstalled my MacBook's hard drive and to my surprise it booted, although not normally. Since it is hackintosh it has some rewritten boot features so it's not a true OSX, but it is fully functional. Since I finally had OSX booted I figured I was in the clear and would be able to install Mountain Lion from this, but then I found out that you have to have Snow Leopard 10.6.8 or later in order to install Mountain Lion.
    Now I'm stuck with a hactintosh version of Lion and still no way to get back to Mountain Lion, is there anything I can do now that I have a functional OSX installation?

  • My mountain lion won't download, says downloading but no progress

    My mountain lion won't download, says downloading but no progress

    Same problem. Appears to be related to the availability of OS X Mavericks now. Here is another post on this issue: https://discussions.apple.com/thread/5503509?tstart=60

  • Downloaded mountain lion but cant open download

    why is my mountain lion refusing to open I have a lap top 10.5.8 and it refuses to open says I need a 10.6.8 or higher I thought thats what I was doing updating my system can anyone tell me what I am doing wrong.I need to sync my ipad with my laptop and nothing is working.ugh

    You need to buy a Mac OS X 10.6 DVD, which are available by phoning the Apple Store, or if possible, start up that Mac in FireWire Target Disk mode and use the other Mac to run the installer on a blank partition or drive.
    (69975)

  • Just upgraded my MacBookPro to OSX Mountain Lion. Now unable to reinstall Capt.Installer driver for my Canon LBP3010 printer. Same installer was used in previous OS

    Just upgraded my MacBookPro to OSX Mountain Lion. Now unable to reinstall Capt.Installer driver for my Canon LBP3010 printer. Same Capt.Installer was used in previous OS.
    Got message that the software was not obtained from Apple or trusted source.
    Anyone can help solve this issue, do not wish to purcahse new printer, and Apple does not appear to be friendly to me

    Apple is still friendly, only became more protective - for your very best. Right-click on the installer, then "Open", and then you get a window offering you the option to run it. That's a ML feature. Again, for your protection.
    Independently, and as not only with Apple, a new OS X is sometimes different, and ML is that bit "pickier" with fully compatible software. So, even if your driver ran under Lion, it can be that it won't under ML. In that case please check Canon's website if they have a newer ML-compatible version, If not, also go and blame Canon. It's their responsibility to provide up-to-date drivers, not Apple's.
    Good luck.

  • Ichat won't open since new hd installation? help.

    ichat won't open since new hd installation? help.
    since installing a bigger hd my ichat won't open. the shortcut is still there and when i click it it bounces in the toolbar a few times then dissapears. i have tried to delete and re-install but i cannot delete it.
    im on osx version 10.8.3, on a macbook pro.
    please help, thank you

    HI,
    I feel there is slightly more to this story.
    Mountain Lion (OS X 10.8.x) does not have iChat.
    It has Messages which is iChat+ as it has had iMessages added to it.
    (I think that a Mountain Lion Upgrade is part of the picture.)
    This suggests you Changed the Hard Drive and either Installed or cloned the OS on to the (new) Drive.
    At this point you may have migrated your Mac User Account from  different computer or the old Hard Drive.
    If you were Migrating apps from an old drive or computer then it is technically possible to "install" iChat in the Applications Folder but it will not work.
    Each version of iChat has to "Match" the OS it is on.
    Broadly speaking that is iChat 4 is in Leopard (OS X 10.5.x) and iChat 5 is in Snow Leopard (OS X 10.6.x)
    In fact it goes deeper than this in that incremental updates in the OS include (sometimes) the updates to iChat.
    This means that by OS X 10.5.8 at the end of the Leopard Updates iChat is at version 4.0.9
    Snow Leopard gets to OS X 10.6.8 but iChat 5 only gets to version 5.0.3 at this point.
    Open your Applications Folder.
    Does this contain iChat, Messages or in fact Both ?
    If you then highlight and then use CMD and i keys (Get Info)  what version information do the app(s) display ?
    The Messages App should not be put inside any other folder.
    I have seen where people have created "Messaging" folders putting MSN, Skype and Messages or iChat in the same folder to "tidy" the Applications folder.
    This can mess up updates.
    In fact if you have done this the DOCK item may point to something that did not get Updated to Mountain Lion.
    10:16 PM      Saturday; April 20, 2013
      iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.3)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),
     Couple of iPhones and an iPad
    "Limit the Logs to the Bits above Binary Images."  No, Seriously

Maybe you are looking for

  • I have 2 apple id's and the ipad and mbp id's do not match for the app store.. How to fix?

    MBP(Snow Leopard) with apple ID 1 iPad synch's MBP to ID 1 since purchase 14 months ago. Upgraded to IOS5 and now App store wants me to do iPad app update using Apple ID2 Question: If I resynch the iPad with MBP(Snow Leopard) will things "reset" so I

  • "Â" characters in email messages

    "Â" character shows up in my email messages from exchange server to iPAD Any ideas what is resulting in this as well as what a possible solution might be?

  • [svn:fx-trunk] 13964: Work around TLF bug #2545307.

    Revision: 13964 Revision: 13964 Author:   [email protected] Date:     2010-02-03 11:47:06 -0800 (Wed, 03 Feb 2010) Log Message: Work around TLF bug #2545307.  ContainerController.mouseWheelHandler() should be checking if the default behavior is preve

  • Safari Crashes when downloading videos..Help :o(

    Hi Guys / Gals Im new here and have been having some problems. Im writing a project for college and will be using some clips from youtube in it (dont worry its all under the fair use act lol) and for some reason anytime i try to down load either dire

  • Having issues with iCloud and sharing photos

    Been having issues sharing photos on Photo Streams.  Every time I try to share with someone else all I can see is that I invited myself and I own the photo stream...even though my wife started the photo stream on her phone with her email address. I a