Can't install EFI Firmware Update

Hello,
i can't install the Firmware Update (EFI 1.1) on my MacBook (Core 2Duo, OS X Version: 10.4.10).
My System is on an GUID partition scheme.
I get a white screen after the "long beep" and after a few minutes the cpu fan start to run.
I disconnected all my peripherals but this does not work either.
Any suggestions?
Regards,
jan

Welcome to Apple Discussions!
This article explains the firmware more in depth and what to do if there is an issue:
http://docs.info.apple.com/article.html?artnum=303364

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Message was edited by: karinaelise8

Please give more information , what version of windows are you try to use via boot camp?.
(in the windows installation process the Mac Os Partition will be there if you put the windows in the wrong partition automatically you are formatting and installing windows on the Mac Os partition.
Hold "Option" for 7 seconds as you hit the power button .
If everything is correct you can choose between Mac or Windows OS for the start up, select the mac OS
If everything is good still you can use your MAC OS normally till you get a fix .
When booting in windows is normally to the mac not recognize the firewire ports, and depending of the version of the windows in your iMac takes about 5 minutes or more for the Boot .
Please note Not all the "intel macs" are compatible with windows 7 ....
Please give more information , but is look like your firmware is OK , (already you try to re-install it)
Take care with disk utility operation, if you can back up your data and reinstall everything again it may help . (a external hard drive and Time machine can help you a lot) .
If you are near by a Apple store , the genius bar guys can give you more details and the proper help ..you can bring the iMac there .

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enelson76 wrote:
Hi all. I've tried to update to the newly released MacBook EFI Firmware Update 1.2, but when I go to run it, it says that my MacBook doesn't need updating. I know that I'm on the older 1.0 Firmware with Boot ROM Version MB21.00A5.B07. Any guesses as to why this new update won't run on my MacBook? It's supposed to be for all versions. Thanks for your help.
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I can't find anything conclusive regarding the problem that you and speddish are having. The only thing that had come to mind was 10.4.10 - and perhaps the update thinking that (as apparently some third party apps have) that the OS was actually 10.4.1. and not 10.4.6 or higher (as required). Logically though, I would assume that, if it were the case, the updater would make mention of it.
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I installed the firmware update as recommended by apple and now I find that most programs crash on a regular basis. In particular, MS Office (Had this installed before the firmware and it worked perfectly) and iTunes.
Can I back out the firmware update?

1) Quit all applications
2) Click Shut Down in the iMac EFI Firmware update window and wait for your computer to shut down
3)Press and hold the power button until you hear a long tone,then release the power button
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If these instructiona appear on your screen again repeat steps 2,3 and 4
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