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My problem is that this firmware update does not work on my Intel iMac (17"):

 

It asks me to turn the Mac off, then hold the power button until it flashes quickly, at which point it should then beep, then perform the update, with showing a progress bar.

 

But for me, it flashes, beeps, then restarts - no updating.

 

And when the Mac has restarted, it brings up the updater app again, telling me that this means that the update failed (and that I should try again, which doesn't help either, though).

 

And the Boot Camp installer won't run because it tells me that my iMac needs its firmware updated.

 

I then tried the other download with the Firmware restore tool which has to be burned to a CD. That one suggests that I do the same, i.e. hold the power button until the LED flashes, then alternates the flashing to slow and then to fast again, at which point it then reads the files from the CD. But again, I get the same effect as before: Holding the power button shows the fast flashing LED but then beeps and reboots.

 

So, I am stuck. And can find no other mentioning of this problem anywhere.

 

I wonder if the problem has to do with the fact that I had installed the XP hack earlier (before boot camp came out). For that, I had to repartition the boot drive and now have 3 partitions on my iMac as seen in DiskUtility: a tiny one of a few dozen MB and empty (not mounted), the HFS+ and the NTFS partition. I wonder if that repartitioning is causing the firmware update problem for me? But others must have done similar repartitioning to install the XP hack, yet I can't find anyone mentioning such problems here.

 

Any ideas?

Yup, I had the same probelm. I found out that if you have already used the old way to dual boot (xom.efi), it will not let you update your firmware. I had to reformat my computer completely (make a backup, and this process will not be as bad), reinstall osx, then do the firmware updater, then run bootcamp, then install windows, then restore from the backup. After all that, (roughly a 2 hour process) my computer is running both oses better than ever!!!

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