MP 1,1-5,1 Mac Pro 1.1 Graphic Issues

[Justin Zimmermann]

Hello everyone,
i have a little issue with my mac Pro 1.1.
Today I bought a new graphicscard (R7 260x) and my system boots naturally in windows and does this absolutely fine and everything works perfect, but if I try to boot into mac os (using bootcamp) I just have a blackscreen and nothing happens, if I swap my graphics card back to the 7300gt it works again.
Anyone any ideas?
And no im not talking about bootscreen I know that the new card doesnt support the bootscreen.

 

[Nguyen Duc Hieu]

Hello everyone,
i have a little issue with my mac Pro 1.1.
Today I bought a new graphicscard (R7 260x) and my system boots naturally in windows and does this absolutely fine and everything works perfect, but if I try to boot into mac os (using bootcamp) I just have a blackscreen and nothing happens, if I swap my graphics card back to the 7300gt it works again.
Anyone any ideas?
And no im not talking about bootscreen I know that the new card doesnt support the bootscreen.

Old Mac OS does not have drivers to support new graphic cards. That's all I can think of.

 

[Justin Zimmermann]

Old Mac OS does not have drivers to support new graphic cards. That's all I can think of.

That’s interesting because my friend has a gtx 660 thats runs fine in my pc and on youtube there are a lot of videos of people putting modern high end cards in their old macs.

 

[Nguyen Duc Hieu]

That’s interesting because my friend has a gtx 660 thats runs fine in my pc and on youtube there are a lot of videos of people putting modern high end cards in their old macs.

And your Mac Pro 1,1 is running what OS?

 

[Justin Zimmermann]

And your Mac Pro 1,1 is running what OS?

El capitan, but I have a spare Harddrive with Lion installed, tried both and both only showed me a blackscreen.

 

[Petri Krohn]

Today I bought a new graphicscard (R7 260x) and my system boots naturally in windows and does this absolutely fine and everything works perfect, but if I try to boot into mac os (using bootcamp) I just have a blackscreen and nothing happens.

The Radeon R7 260x may work in a Hackintosh, but not on a real Mac. The device ID 0x6658 is not recognized by macOS. To make it work, you would need to spoof the device ID.

Radeon Compatibility Guide - ATI/AMD Graphics Cards

Radeon Compatibility Guide ATI/AMD Graphics Cards Last Change: December 2nd, 2017 The "boot to black screen" issue as well as the broken sleep/wake have been fixed! Read below for details. 0. Introduction Most of you might have noticed that the Buyer's Guide doesn't list a single...

www.tonymacx86.com

 

[Justin Zimmermann]

The Radeon R7 260x may work in a Hackintosh, but not on a real Mac. The device ID 0x6658 is not recognized by macOS. To make it work, you would need to spoof the device ID.

Radeon Compatibility Guide - ATI/AMD Graphics Cards

Radeon Compatibility Guide ATI/AMD Graphics Cards Last Change: December 2nd, 2017 The "boot to black screen" issue as well as the broken sleep/wake have been fixed! Read below for details. 0. Introduction Most of you might have noticed that the Buyer's Guide doesn't list a single...

www.tonymacx86.com

First of all thanks for the advice,
this is really sad since I just bought it but you sad I can „spoof“ the device ID to make it work?
Can I do this by mysel, if yes how and is it harmful for my card?