Mac Pro Won't Start After Installing Security Update Tonight

I just installed the latest security update for Lion on my Mac Pro via software update. The update seemed to install fine. I was about to start work when all of a sudden the system rebooted on its own. Now it just continues to reboot because it can't complete the boot up.
I tried resetting PRAM and SMC, but this didn't help.
I tried booting up from CD using an old SNL disk. I was able to get to disk tools once. I checked my startup volume and disk tools said the volumes is fine. I was checking permissions when once again the system rebooted on its own.
I tried starting up in safe mode, but it only gets so far into the boot process before it reboots.
I tried starting in verbose mode, and noticed several SMC related errors (this is why I tried to reset the SMC). No joy.
If I leave the system sit a few minutes, it gets further into the boot process, but still won't boot completely.
Any suggestions?

Mac Pro tower or MacBook Pro notebook? Which model?
If you are encountering kernel panics, check in the logs as suggested here and post a recent kernel panic log:
http://support.apple.com/kb/HT2546
Mac OS X: How to log a kernel panic

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Mac book Pro won't start after installing a update, Mac book Pro won't start after installing a update

I installed a update on my Mac book pro, now when I try to start it, it'll come up with the apple logo and a loading bar below it, gets to about 1/4th and shuts down every time.

Hi Jacobmitchell92,
If you are unable to start up past a grey Apple screen after doing a software update, you may find the following articles helpful:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem.
http://support.apple.com/kb/TS4636
Regards,
- Brenden

Safari won't start after installing security update 2006-001

today i updated my computer with the latest Security patch. Now my computer wont start the browser
i deleted the preference file on my preferences folder to try to solve the problem, but i still wasn't able to start the browser.
i created a new user and tried to start safari once more, but still the progam crashes before it even starts.
this is the output that i get from the crash reporter
Date/Time: 2006-03-02 16:44:55.777 -0500
OS Version: 10.4.5 (Build 8H14)
Report Version: 4
Command: Safari
Path: /Applications/Safari.app/Contents/MacOS/Safari
Parent: WindowServer [63]
Version: 2.0.3 (417.8)
Build Version: 1
Project Name: WebBrowser
Source Version: 4170800
PID: 445
Thread: 0
Exception: EXCBADINSTRUCTION (0x0002)
Code[0]: 0x00000002
Code[1]: 0x95aadd70
... also the Sofware update softare wont start. It will crash before it even starts.
this is the output from the crash reporter
Date/Time: 2006-03-02 16:43:46.431 -0500
OS Version: 10.4.5 (Build 8H14)
Report Version: 4
Command: Software Update
Path: /System/Library/CoreServices/Software Update.app/Contents/MacOS/Software Update
Parent: WindowServer [63]
Version: 2.0.5 (2.0.5)
Build Version: 24
Project Name: SoftwareUpdate
Source Version: 1360000
PID: 439
Thread: 0
Exception: EXCBADINSTRUCTION (0x0002)
Code[0]: 0x00000002
Code[1]: 0x95aadd70
any ideas how to fix it?
Powerbook G4 12" 1.5GHz Mac OS X (10.4.5)

- FOR OS VERSION UPDATES YOU CAN ROLL THEM BACK
have to trash the UPDATE10.4.?.PKG file that is located in:
Hard drive> Library> recipts folder> ??.pkg file. (check spotlight search if you cant navigate to the Recipts folder for .pkg files to take out the one for the latest update you have done.
Basically the only way to "roll back" any applications or drivers that are updated is to do an entire Archive and Install of your OS (can do preserving user and network settings and WILL NOT LOOSE ANY DATA) see knowlege base article 107120 for A&I how to. You can always do the software updates later after the A&I.
That particular security update may have been faulty so of course, mabye try the DL again to see what happens and by all means CHECK THE SUPPORT TAB of this site for software updates if you want to do them. IF IT AINT BROKE, DONT FIX IT. most software updates do little or nothing for the application and somtimes they could cause problems LIKE loosing your itunes library when going from 5.0 to 6.0 and so on...

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If you are coming from 10.5.8, hopefully you backed up your important data first. Your mini will need at minimum, 1 GB of RAM to install Snow Leopard and at least 5 GB of storage remaining on your boot drive.
I treat 10.6.3 as a fresh, full install over a 10.5.8 system. That means I choose Disk Utility from the Installer's menu and repartition the boot drive as a single partition, Mac OS X Extended (Journaled) format, and use the GUID partition scheme from the options button. At this point, while still in Disk Utility, I would verify the drive under First Aid.
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I have installed Mavericks on my Early 2009 Mac Pro and all seemed to install just fine but when I restart the Mac then it won't get past a grey screen with Apple logo. It seems that it does get reasonabley far into the startup, it gets passed the grey screen with cricling progress thingmy under the Apple logo, then it flashes very quickly and after that it is a grey screen with the Apple logo and no further.
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Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.
There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.
a. Boot into the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.”
b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
Sometimes a boot failure can be resolved by resetting the NVRAM.
Step 3
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 4
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 5
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
Step 6
Boot in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 6.
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Step 7
Launch Disk Utility in Recovery mode (see Step 1.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
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Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
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Repeat Step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
Step 10
This step applies only to older Macs (not current models) that have a logic-board ("PRAM") battery. Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a boot failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
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If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

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First for safety, "Try Disk Utility
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http://docs.info.apple.com/article.html?artnum=106214
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hi
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thanks.

hi
i just installed the newest security update and now mail won't open. i get the spinning ball of death.
has anyone else had this problem or have any ideas how to fix it without reinstalling everything?
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I just apply the security update today in my MacBook (aluminum), but then the laptop cannot start.
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Hi T,
Yes, that is the key we all are getting while the announced shows the key first presented in the update released as 2010-001, back in January. Nothing else reported besides the SHA1 diff.
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Hi Jacobmitchell92,
If you are unable to start up past a grey Apple screen after doing a software update, you may find the following articles helpful:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem.
http://support.apple.com/kb/TS4636
Regards,
- Brenden

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Odd.
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Hi,
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If you don't have access to a retail disc, you can create an installation disc yourself using another PC - just download the correct Disc Image from the link below and use an application such as ImgBurn to burn the ISO correctly to a blank DVD - a guide on using ImgBurn to write an ISO to a disc is Here. These Images are clean and from a well-respected source, however there are only limited versions available.
Windows-7 sp1-iso-official-32-bit-and-64-bit
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http://www.kodyaz.com/articles/how-to-activate-windows-7-by-phone.aspx
Any additional drivers you may need can be found Here.
Regards,
DP-K
****Click the White thumb to say thanks****
****Please mark Accept As Solution if it solves your problem****
****I don't work for HP****
Microsoft MVP - Windows Experience

Mac Pro Won't Start After Installing Security Update Tonight

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