I recently replaced my old 7300 GT with a ATI Radeon HD 5770 card but I miss the neccessary drivers.

Someone told me that the Snow Leopard Graphics Update would help but I have installed the latest version.

Looking under Apple - About this Mac - More info - GraphicsDisplays everything seems OK, but if I look under PCI-card in the same dialogue box it says Driver installed: No How come Do any one know why.

Installed the 5770 and updated all to 10.6.6 but the system does not recognize HDMIDisplay port audio.

I still cant change the background from the default for the second monitor but everything else seems to work perfectly.

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I believe my graphics card problem is unrelated to EFI, however.

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Intel model). After posting at discussions.apple.com, I was encouraged to run Apple Hardware Test to test for any hardware faults.

Unfortunately, ever since I replaced my old graphics card with a new one (The nVidia GeForce GT 8800 for Mac, which had worked great for years, burnt out, and Apple Corp.

The Mac Pro is fully updated, running OS X Snow Leopard, 10.6.7.

It has 6 GB of RAM -- plenty for my purposes -- and I run system maintenance routines weekly to correct permissions, etc.

I first noticed a change in the boot process after installing the 5770 graphics card.

As everyone knows, after pressing the Macs power button, a chime is heard.

After a moment or two of darkness, the grey screen Apple logo appear, followed eventually by Finder.

Ever since I installed the 5770 however, the screen remains blank until JUST before OS X has fully loaded (sometime AFTER the grey Apple logo would ordinarily appear on-screen, but before Finder opens up).

Everything else seems to work just fine.until I tried booting (while pressing the d key) from my system disc, to run Apple Hardware Test.

As best as I can tell, everything loads up normally, except that I cant see it.

After hitting power, and pressing d, the optical drive spins up, and I can hear that the system disk is being read, and then everything quiets down, and there I am sitting in front of a blank screen.

Im fairly sure the computer is not frozen because it responds to key combinations like control-command-option-eject, the keyboard shortcut for fast shutdown.

I have experimented with various other start-up key combinations (like c, or command-option-p-r to flash the PRAM, etc.), and have confirmed (just by listening to the sounds that the Mac Pro makes while its booting, for lack of any visual confirmation) that those low-level boot processes are in fact working properly.

Ati Radeon Hd 5770 Upgrade That Took

My suspicion is that the new 5770 graphics card isnt being initialized early enough in the boot process, maybe as a result of the boot ROM upgrade that took place when I installed it.

System Profiler identifies my current boot ROM version to be MP11.005C.B08.

A quick Google search confirms that this version is associated with Mac Pros which have been upgraded with the ATI Radeon HD 5770 graphics card.

Ati Radeon Hd 5770 Password Entry Prompt

Booting to the EFI password entry prompt as it was supposed to, but failing to route that low-level process to the video card -- all I could see is the blank screen).

So, dear reader, thank you for having the patience to read about my problem.

Not being a qualified technician, I understand that many of my assumptions may be speculative, but I believe that Ive been thorough so far.

Fortunately, this problem is not debilitating for me right now, but I can foresee having troubles in the future (like when it comes time to upgrade the OS to Lion).

If the ATIApple engineers havent written a firmwareboot ROM fix (assuming that is whats needed) by then, Perhaps it will finally be time to buy a new computer: Please do not hesitate to re-post this on any other forum where you believe it might be relevant.

Thanks in advance for any help you can offer -kapok Mac Pro 1,1, 6 GB RAM, OS X 10.6.7, ATI Radeon HD 5770 GPU.

I followed your instructions carefully, and my firmware password has been reset.

Ati Radeon Hd 5770 Mac Os X Driver