Mac Pro 1.1 Boot Screen

[Mac P]

I am making this thread as a safeguard to make sure i'm about to do the right thing.

I have had my had my Mac Pro 1.1 for a while now and i am using a (none-apple) 5770 in it. I also have a 7300 gt which i am not using as it is not supported on Yosemite. If i have the 7300 gt in, i get boot screens but it causes terrible lag as it only recognises 8mb of VRAM. If i have the 5770 in then i don't get boot screens but the system runs smooth. I now want Yosemite to recognise the card as a 5770 instead of a 5000 series and i also want boot screens for my monitors. To achieve what i want is this what i have to do? :http://forum.netkas.org/index.php/topic,692.0.html

Thanks

 

[666sheep]

Yes.

 

[Ih8reno]

How'd you get Yosemite running? I've tried the pike installer, the thirty two to sixty four and either nothing happens or my usb's stop working and hardware acceleration doesn't work.

 

[Mac P]

I used a pre-modded installer which used the boot.efi method. Unfortunately I can't remember where I got this from but if I find it then I'll share it with you. It was as simple as plugging in the usb and installing Yosemite just like a normal Mac. It works so well that you forget it's not even a supported system!

 

[Ih8reno]

I tried everything, and always a problem. Finally I installed through my MacBook and changed the boot.efi files but for down reason it picks up my flashed hd 5770 card as. 5000 but no hardware acceleration.

 

[Mr. Zarniwoop]

my flashed hd 5770 card as. 5000 but no hardware acceleration.

OS X doesn't recognize it as a flashed card. Is there any indication anywhere that it's properly Mac-flashed?

 

[Ih8reno]

Where could I check this? Also, I don't own a pc so if it's not flashed how can I do it on my Mac Pro?

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Oh, it works fine in 10.7