4 Replies Latest reply: Jul 30, 2012 7:56 AM by The hatter
Midnight Raver Level 1 Level 1

Hello all, I have a 2009 MacBook Pro. I have had problems recently trying to do a clean install of the os. It failed with lion, and now with mountain lion it has been going for three days but is still moving. With lion i tried downloading multiple times, and put it on the usb multiple times. My windows partition works fine, so this leads me to wonder if it's not a hardware problem and if I'm consistently getting a bad download. The download worked on my sisters computer though, but this was an upgrade from lion and not a clean install via USB. I tried going all the way back to leopard as I couldn't find my snow leopard disk and that installed fine. Anyone have any ideas on what's up? Is it maybe a piece of hardware that needs to be replaced? Should I continue letting the mountain lion try to install despite the fact that it has been going three days even though the loading bar is still moving? Any help or advice would be appreciated.


- Ryan

MacBook Pro, OS X Mountain Lion
  • mende1 Level 10 Level 10

    Do an upgrade. Clean install takes a lot to give the same performance as an upgrade. If you don't use a lot of apps, upgrade from 10.7

  • whitewater2 Level 3 Level 3

    Not sure whats up with yours, but I had a similar issue (no other bootcamp or partitions on mine though). My Macbook Pro 2010 I attempted a clean install from a USB made ML disc. Started the upgrade, then it failed. I then could not install Snow Leopard/ Lion / Mountain Lion, kept getting error. Submitted report to Apple, I have yet to hear back from them.


    My savior was that I installed ML onto a USB device, making it bootable. I then used Carbon Copy Cloner after booting into my ML USB boot drive, and cloned it to my internal drive. Worked fine afterwards. If you have a spare USB drive, you can try doing that. Its a good habit to make bootable back ups of your drive if you have a USB hard drive.

  • Vestan Pance Level 2 Level 2

    You say you have a partition on your hard drive - is this a bootcamp partition? If it is I would reformat your hard drive, removing your bootcamp partition.


    It seems that a few people who tried to do a clean install of Lion when it was released, while leaving their bootcamp partition in place, experienced similar(ish) problems. Do a search on google for more information.


    FWIW - I did a clean install of ML on my 2007 MBP last night and it works like a charm - it only took around an hour. Always backup or make a clone.

  • The hatter Level 9 Level 9

    Wifi? there have been problems - and fixes. I assume that is the only thing that could take so long (though download an OS why should it take longer than downloading three full length movies from iTunes Store? it shouldn't)


    Clean? just clone your system or make sure you have a good backup (or two) and with the actual install process - not the download which is separate issue - it can go like light-ning on an SSD in minutes. And Setup Assistant? nice good way to start off.


    I would say there is no way to know if your system will run better or not or if it takes longer in the end, or just 'safer' and more stable method to get ML installed.


    And you do want to save the installer so you can avoid downloading another 4GB later.


    Free space or lack thereof is one factor, or maybe it is time for an SSD or new hard drive; swapping out the hard drive before it fails or checking to see if spare blocks have been used is best indication of likely or impending drive issue.


    There are guides how best to put Lion/ML on 8GB USB and using Disk-Maker



    How to make a bootable Mountain Lion install drive

    https://www.macworld.com/article/1167857/how_to_make_a_bootable_mountain_lion_in stall_drive.html

    Making sure your disk drive does not have any errors can only be done by spending time and effort and scanning for media errors or having a program that will - and a new OS is a good enough time for that.


    Mac users just need to stay up to date and make sure your hard drive is free of errors,



    OS X Lion: Unable to download OS X Lion wirelessly from Mac App Store - "Your device or computer could not be verified"

    Products Affected

    Mac App Store, OS X Lion


    When attempting to purchase or download OS X Lion from the Mac App Store wirelessly with your Apple ID account, you may receive a dialog stating "Your Device or computer could not be verified. Contact support for assistance." This could happen when upgrading Mac OS X v10.6.6, 10.6.7, or 10.6.8 to OS X Lion via a Wi-Fi connection.


    Use the following steps to delete your network preferences.

    Important: You must be logged in as an administrator.

    1. Click the Finder icon in the Dock.
    2. Choose Go to Folder from the Go menu.
    3. Type /Library/Preferences/SystemConfiguration
    4. Copy the file networkinterfaces.plist to the desktop (to make a precautionary backup).
    5. Delete the file "networkinterfaces.plist." from SystemConfiguration.
    6. Restart your Mac.
    7. Create new location in Network preferences, in System Preferences.
      Once your computer has restarted, you will need to refresh your network settings to be able to connect to the Internet again: 
    1. Choose System Preferences from the Apple menu.
    2. Choose Network from the View menu.
    3. From the Location pop-up menu, choose "New Location".
    4. Type a name for your location and click OK.
    5. Click the Apply Now at the bottom right to accept the changes.

    If your network connection requires any special settings, you will need to enter them again.

    Once you have made these changes, you should be able to connect to the Internet, open App Store, and try your OS X Lion purchase or download again.

    Additional Information

    This issue may occur if your Mac's Ethernet port is damaged or inoperable, even if you aren't using Ethernet to try to download Lion.