Power mac won't reboot after installing OS 10.8

I installed an online copy of OS 10.8 I bought from Apple and now my 5 month-old Quad Core Mac Pro will not boot up. It keeps cycling through start-up then shutting down. I was able to do a safe start by holding the SHIFT key where I was able to update my NVIDIA Graphics Quadra 4800 card with the latest 10.7 software. When I tried to download their latest 10.8 "safe" software it would finish the download. Now I can't start the computer holding the SHIFT key.

It didn't help. I have an NVIDIA quadro 4800 Graphics Card installed and I was able to download the latest update in 10.7.4, but 10.8 doesn't allow me to install the update that, bTW, says works with 10.8. Now my Mac Pro doesn't see the graphics card and I can't use FCP or Resolve. Here's the problem log:
Interval Since Last Panic Report: 6359529 sec
Panics Since Last Report: 5
Anonymous UUID: 4CB87D56-DA4B-4815-8FB1-DD0E8BA6EA61
Wed Aug 8 14:45:07 2012
panic(cpu 10 caller 0xffffff80002b7b95): Kernel trap at 0xffffff7f822faffc, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x000000000000001c, CR3: 0x000000000bf3c025, CR4: 0x00000000000206e0
RAX: 0xffffff8008cb1b04, RBX: 0x0000000000000000, RCX: 0x0000000000000000, RDX: 0x0000000000000000
RSP: 0xffffff81b697b0b0, RBP: 0xffffff81b697b1f0, RSI: 0x0000000000000000, RDI: 0x0000000000000000
R8: 0x0000000000000000, R9: 0xffffff81b697b3c0, R10: 0xffffff7f822faf50, R11: 0x0000000000800000
R12: 0x0000000000000000, R13: 0x0000000000000001, R14: 0xffffff8008cf0204, R15: 0xffffff8008314004
RFL: 0x0000000000010246, RIP: 0xffffff7f822faffc, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x000000000000001c, Error code: 0x0000000000000000, Fault CPU: 0xa
Backtrace (CPU 10), Frame : Return Address
0xffffff81b697ad50 : 0xffffff800021d5f6
0xffffff81b69
Model: MacPro5,1, BootROM MP51.007F.B03, 8 processors, Quad-Core Intel Xeon, 2.4 GHz, 16 GB, SMC 1.39f11
Graphics: ATI Radeon HD 5770, ATI Radeon HD 5770, PCIe, 1024 MB
Graphics: Display, PCIe
Memory Module: DIMM 1, 4 GB, DDR3 ECC, 1066 MHz, 0x0000, 0x256834470031553742465238432D48392000
Memory Module: DIMM 2, 4 GB, DDR3 ECC, 1066 MHz, 0x0000, 0x256834470031553742465238432D48392000
Memory Module: DIMM 3, 1 GB, DDR3 ECC, 1066 MHz, 0x802C, 0x394A53463132383732415A2D314734473120
Memory Module: DIMM 4, 1 GB, DDR3 ECC, 1066 MHz, 0x802C, 0x394A53463132383732415A2D314734473120
Memory Module: DIMM 5, 4 GB, DDR3 ECC, 1066 MHz, 0x0000, 0x256834470031553742465238432D48392000
Memory Module: DIMM 7, 1 GB, DDR3 ECC, 1066 MHz, 0x802C, 0x394A53463132383732415A2D314734473120
Memory Module: DIMM 8, 1 GB, DDR3 ECC, 1066 MHz, 0x802C, 0x394A53463132383732415A2D314734473120
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (5.106.198.4.20)
Bluetooth: Version 4.0.5f11, 2 service, 18 devices, 0 incoming serial ports
Network Service: Ethernet 2, Ethernet, en1
Serial ATA Device: HL-DT-ST DVD-RW GH61N
Serial ATA Device: WDC WD1001FALS-41Y6A1, 1 TB
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x5a100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0x5a110000 / 3
USB Device: Generic USB Hub, 0x058f (Alcor Micro, Corp.), 0x9254, 0x1d100000 / 2
USB Device: hub_device, apple_vendor_id, 0x911f, 0x1d130000 / 4
USB Device: Keyboard Hub, apple_vendor_id, 0x1006, 0x1d131000 / 7
USB Device: Apple Optical USB Mouse, apple_vendor_id, 0x0304, 0x1d131300 / 9
USB Device: Apple Keyboard, apple_vendor_id, 0x024f, 0x1d131200 / 8
USB Device: Apple Cinema HD Display, apple_vendor_id, 0x921f, 0x1d133000 / 6
USB Device: hub_device, apple_vendor_id, 0x9130, 0x1d140000 / 3
USB Device: Apple Cinema Display, apple_vendor_id, 0x9222, 0x1d142000 / 5
FireWire Device: built-in_hub, 800mbit_speed

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alan81 wrote:
After installing Lion on a 2007 MacBook pro, it won't reboot. Just gets to the gray screen with the spinning wheel. Have tried re-installing and disk repair to no avail. Anyone else figured out how to fix?
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Odd.
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Hi, it maybe "too late" to ask now, but did you Repair Disk Permission before doing the updates, and after the (auto) restart, did you do another Repair Permission and then restart again?? And in this whole process of updating, especially Apple OS, Security Updates and Apps Updates, did you unplug all the external devices??
I know on the net some "schools" say there is no need to do this, and that you can run apps in the background and still do the Software Updates; I beg to differ, then you'll see lots of posts here asking for help, and at the same time cursing and swearing at Apple.
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So pardon me, and I apologise for nagging, but don't blame Apple or someone else when your mac acts up because you did not even prepare the basic procedures. Ask yourself this very simple question, if you are ill and taking medication, would you take it down with alcoholic drink?? Which may worsen your body situation?? Maybe it's not a very good example.
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Mac won't boot after power chord became unplugged accidently.

Mac won't boot after power chord became unplugged accidently.
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Hi, Nigel.
Not to differ with my colleagues here, but there's an important question that wasn't asked.
1. You wrote: "So far, I've booted from the original disc and repaired the permissions as well as the disc, then re-booted, but same old blue screen."Did Disk Utility report any errors it could not fix when you ran Repair Disk? I suggest you run the procedure specified in my "Resolving Disk, Permission, and Cache Corruption" FAQ. Perform the steps therein in the order specified.
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3. Repair Disk gives your Mini a clean bill of health, the blue screen may be the result of some Startup or Login item that was corrupted due to the sudden power outage. My "Troubleshooting Startup and Login Items" FAQ can help you pin that down if such an item is causing the problem and may help you avoid and Archive and Install.
4. If you elect to go the Archive and Install route, see my "General advice on performing an Archive and Install" FAQ for some important tips on this process.
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Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

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Mac won't restart after updating to OS X Mountain Lion. Please help?

Like what happens? Is it just spinning?
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After contacting HP Technical Support and speaking to a supervisor we were able to solve the problem of Windows continuously rebooting after installing SP3. Here are the steps that fixed the problem with my HP Pavilion running on an AMD processor. The steps are actually fairly straight forward and easy....
Issue: The computer reboots continuously after installing Windows XP service pack 3
Computer reboots continuously after installing Windows XP service pack 3 on AMD systems. The problem is that with some configurations, SP3 causes the computer to crash during boot, and Windows XP, by default, is set up to automatically reboot when it crashes. That is why you end up in the endless rebooting scenario.
Cause:
On HP computers, the same Windows installation disc image for Intel processor based PC's is deployed for the AMD processor based computers as well. Because the original installation image for both Intel and AMD is the same, all have the intelppm.sys driver installed and running. That driver provides power management on Intel-based computers. On an AMD-based computer, amdk8.sys provides the same functionality for power management.
Symptoms:
Ordinarily, having intelppm.sys running on an AMD-based computer appears to cause no problems. However, on the first reboot after a Service Pack 3 installation, it causes a big problem. The computer either fails to boot, or crashes with a STOP error code of 0x0000007e.
You may not see the error code because the computer reboots too fast. In order to get the error message, you need to set an option during startup. To do so, open the windows advanced menu by tapping the f8 key on startup. Then select the "Disable automatic restart on system failure" option.
Solution:
If you have an AMD-based computer, however, you do not need the intelppm.sys driver and can disable it. There are three methods in order to do this.
Step 1: Please try to log on the system in safe mode.
1. While using Safe mode open the command prompt.... Start, All Programs, Accessories, Command Prompt
Run the following command in the command prompt just like it's typed: sc config intelppm start= disabled
Step 2:
If the issue persists, please try to log on or boot the system in recovery console (refer to the web document)
2. Using recovery console:
If you booted into the recovery console, from a command prompt, type: disable intelppm
Step 3: Please check in registry.
3. Using windows registry:
1. Run regedit
2. Click on HKEY_LOCAL_MACHINE
3. From the File menu, select "Load hive"
4. Navigate to %systemdriver%\Windows\System32\Config on the dead system and select the file name System
5. Name it something you can remember, such as "horked"
6. Navigate to horked\ControlSet001\Services\IntelPPM
7. Double click the Start value and set it to 4
8. If you did what I did and completely messed things up by running a disk check previously, navigate to ControlSet001\Control\SessionManager. Open the BootExecute value and clear out the autochk entries.
9. Repeat steps 6-8 for the other control sets.
10. Reboot
Reference:
http://support.microsoft.com/kb/888372
Additional information:
Computer Restarts after Displaying Stop Error 0x0000007E (After Updating with Service Pack 3 for Windows XP):
http://h10025.www1.hp.com/ewfrf/wc/genericDocument?docname=c01457284&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN
For future reference: Service pack 3 Installation steps:
Before installing the service pack 3 update, please follow the steps listed above and save yourself much time and effort.
To uninstall service pack 3, I suggest that you uninstall it from add/remove programs.
Step 1:
Uninstall service pack 3 from add/remove programs:
1. Click Start.
2. Select Run.
3. Type appwiz.cpl in the run field.
4. Click OK.
5. Click change or remove programs.
6. Select the program -service pack 3 that you want to uninstall or remove.
7. Click Remove button.
8. It will pop up the message stating that "Are you sure you want to remove the programs".
9. Click Yes. It will help you to remove or uninstall the installed programs from add and remove programs.
Step 2: If the issue persists, I suggest you to perform system restore and then try to install the service pack 3 after performing the steps mentioned above in regards to removing the intelppm.sys Driver.
Using Microsoft System Restore in Windows Me and XP:
http://h10025.www1.hp.com/ewfrf/wc/genericDocument?docname=bph07103&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN
Step 3:
How to obtain the latest Windows XP service pack :
http://support.microsoft.com/kb/322389/
Steps to take before you install Windows XP Service Pack 3:
http://support.microsoft.com/kb/950717/en-us
I hope this helps someone who is having this problem. It sure took me a minute to get it all figured out. :0)

Still useful as of 12/30/11. Have ten Lenovo 5042 computers with downgrade licenses to run XP and have a ghosted image from another Lenovo 5042 having and Intel cpu. My target computers all have AMD cpus in them and the image would continuously reboot on
the AMD computers.
Used method 1 and it cleared the problem instantly, many thanks for the post and the time and effort it took to dig up the answer..

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