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Sapphire RX 580 Pulse 8GB GPU In my Mac Pro

Joined
Jan 15, 2019
Messages
1
Hi Guys,

I bought this Saphire Radeon rx580 pulse 8gb GPU for my MAc Pro begin 2008. I have it connected with the two min pcie connectors. So powered the right way I think.
The problem is that only the fans are working but there is nothing on the screen. I connected it via DVI.

Right now I have El capitan 10.11.6 installed.

What could be the problem???
 
Joined
Nov 28, 2011
Messages
137
Motherboard
ASUS Prime H370M-PLUS
CPU
i5-8600
Graphics
RX 570
Mac
iMac, MacBook Pro, Mac mini
Mobile Phone
Android
Hi Guys,

I bought this Sapphire RX 580 Pulse 8gb GPU for my Mac Pro begin 2008. I have it connected with the two min PCIe connectors. So powered the right way I think.
The problem is that only the fans are working but there is nothing on the screen. I connected it via DVI.

Right now I have El Capitan 10.11.6 installed.

What could be the problem???
You have Lilu and Whatevergreen (latest) installed?
 

Stork

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Joined
Sep 21, 2010
Messages
12,965
Motherboard
ASUS ROG MAXIMUS X HERO Z370
CPU
i7-8700K
Graphics
RX 580
Mac
MacBook Pro, Mac mini, Mac Pro
Classic Mac
Power Mac, PowerBook
Mobile Phone
iOS
You have Lilu and Whatevergreen (latest) installed?
No! Lilu and Whatevergreen kexts are for Hackintoshes, not Mac Pro's.

I tested a Sapphire RX 580 Pulse 8GB card in my Mac Pro 5,1. It gave me a black screen until it booted to the Desktop because the card's VBIOS was not patched with an EFI VBIOS patch. Unfortunately, there is no EFI patch for the RX 580. But, the good news is it works great with macOS High Sierra 10.13.6 and Mojave once you get to the Desktop.

@PeterMac, you won't be able to get the RX 580 to work in a 2008 Mac Pro running El Captian because the Apple RX 580 drivers didn't appear until 10.13.6. Sell it and get a used EVGA GTX 680 and flash it to work in the Mac Pro 3,1. I've done this and have figured out how to run High Sierra on my 2008 Mac Pro 3,1. You can too. See the MacRumor's Mac Pro forum section for information > https://forums.macrumors.com/forums/mac-pro.1/
 
Last edited:
Joined
Jul 10, 2012
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Mac
Mac Pro
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LC, Power Mac
For a Radeon RX580 to work on a 2008 Mac Pro 3,1 you need
  1. MacOs 10.13 High Sierra
  2. Dosdude's High Sierra patcher
The Metal drivers for RX580 and other AMD video cards require the SSE4.2 instruction set which is missing from the Harpertown Xeons on Mac Pro 3,1. You can stay on High Sierra or get a Nvidia Kepler card (GTX 680 / GTX 770) and install Mojave.

P.S. - The issue has already been discussed here: RX580 on a Mac Pro 3,1 - Mojave (SOLVED)
 
Last edited:
Joined
Jan 25, 2019
Messages
3
Thanks. I ended up with a GTX680, still have a new RX580 sitting in a box. Will keep an eye out for a newer cheese-grater , maybe after mac announces a new mac pro some newer versions will flood the market - 2010 etc.
 
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