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After updating today MacPro with OS 10.7.5 will not restart, can someone advise what to do?

6614 Views 35 Replies Latest reply: Sep 25, 2012 6:30 PM by Skypainter RSS
  • FatMac\>MacPro Level 4 Level 4 (2,070 points)

    aviationwiz wrote:


    FatMac\>MacPro wrote:


    A general question since I did the upgrade both on an actual Lion installation and a virtual machine and both worked: how was the upgrade done? Using Software Update, a downloaded Delta updater or the Combo Updater? In both instances I used the downloaded Combo Updater without any problem.


    I updated my computer using Software Update

    Thank you. From the wording of other posts in other forums, that seems to be the most common thread connecting the problems so far. Indeed, there's one thread in the Mountain Lion community complaining about the 10.8.2 update now not showing up in Software Update. I wonder if it's been pulled.


    I believe (somebody correct me if I'm wrong) that the update delivered by Software Update is customized for your Mac to make the download as small as possible. The updates that developers are offered for testing are the delta and combo files, so it may be the process rather than the file components that are at issue here. I've been trying the updates on both Lion and Mountain Lion on partitions in a multi HD Mac Pro, and the combo updaters seem to work.

  • aviationwiz Calculating status...

    I just took out 2GB of RAM to bring me down to 6GB, and am still exhibiting the same problems. I also can not boot to the Recovery drive.

  • aviationwiz Level 1 Level 1 (0 points)

    Grant Bennet-Alder wrote:




    " A Mac that cannot boot to an appropriate Installer DVD has a Hardware problem."


    I would normally tend to agree, but that problem started alonside all the other problems that have just started occuring from the 10.7.5 update.

  • Grant Bennet-Alder Level 8 Level 8 (48,110 points)

    Pull all your Hard Drives.

    Restart while holding the Option key. this should get you into the ROM-resident Startup Manager:


    Startup Manager: How to select a startup volume


    With no drives, you should get a blank screen, but the Eject/Open DVD should be active. use it to open the DVD reader and insert your Installer DVD.


    Will it now show up as a bootable Volume?


    Will it actually Boot?

    -If yes, there is something on one of your other drives that is causing a problem starting up.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Sway CPT Calculating status...

    I had the same problem, on my MBP (


    Bought Mountain Lion 10.8.2


    Created a Boot Disk.


    Installed it over the top.


    Et voila!


    So, there you go...


    My problem solved.

  • ivan54 Level 3 Level 3 (860 points)

    Hi Skypainter,


    What graphics card (or cards) do you have?


    Can you boot into verbose mode (Command V) and post the log you get?  (is it a panic screen?).

    If you can't boot into Safe Mode, the Verbose mode may help diagnose.

  • akirish Calculating status...

    I have the same problem -- hangs up after login.  Safe Mode restart actually allows startup, but with two logins required for some strange reason.  I am not sure what is happening there!  The second login comes up automatically and I am no longer in Safe Mode.  Shutdown and restart and the problem is still there.  I have not tried any PRAM flush or disk repair as yet.


    The last crash report in the system log had the following -- typical of all the problems logged:


    2012-09-22 18:35:23 +0700[1]: Job appears to have crashed: Segmentation fault: 11

    2012-09-22 18:35:23 +0700[1]: Throttling respawn: Will start in 10 seconds

  • akirish Level 1 Level 1 (0 points)

    Sorry, all this on a Macbook Pro (mid-2010) that has previously had graphics chip failure resulting in kernel panic attack.  The second of two attempts at replacement was successful.

  • akirish Level 1 Level 1 (0 points)

    Further info:


    Second login shows two login IDs (one of which was deleted today.  Login window states SAFE Mode, but no such designation appears on desktop menu bar.


    Cannot verify or repair disk permissions as "insufficient permissions".


    Is the install somehow corrupted?


    Any suggestions.

  • The hatter Level 9 Level 9 (58,560 points)

    Many of us recommend against Apple RAID card, even against RAID5.


    New OS is a good time to backup, erase/reload.


    AND use a bootvdrive not on the controller.

  • aviationwiz Level 1 Level 1 (0 points)

    Just as an update to my specific problem, I brought it in to the Apple Store today, and using an external drive to boot in to first, they were then able to get my Mac Pro to boot in to 10.7.5 with that drive being the only one in the system, incorrectly diagnosing my other hard drive as bad. I brought it home, and within minutes, the display had blurry lines throughout, the colors were off, and quickly moved to a full blown lock up. I then tried to install 10.7.4 from my bootable flash drive, however, even with 10.7.5 completely wiped off my drive, the display problems persisted.


    Purchasing a new video card ($250) from Micro Center fixed the problem, and I was then quickly able to restore my system from a Time Machine backup (which was on the drive the Genius Bar erroneously diagnosed as bad). Now I'm up and running on 10.7.4, and won't be touching 10.7.5 again.


    While I'm not sure how an OS software update could brick a video card, I do know that the problem I had started after restarting from the 10.7.5 install, and then persisted to have problems (and make the computer unusable) until it was replaced.


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