RX 580 won't boot macOS on MP 3.1

Saaihead

macrumors newbie
Original poster
Nov 10, 2018
5
2
I run 10.13.6 on a 3.1 Mac Pro. Before I had a GTX 1060 in here, but by accident I installed the update to 17G3025 so that card stopped working. Due to the absence of new Nvidia drivers I decided to sell this card and purchase a RX 580. Also because I wanted to upgrade to 10.14 Mojave later on.

The exact device I purchased: Sapphire Pulse Radeon RX 580 4GD5 (11265-09)

But now, when I start up my computer, the screen stays black. (I knew no bootscreen would appear) And where usually the login screen appears, I get a white screen for a few seconds. After that it gets dark again for a few seconds, and white again and this goes on forever. Luckily I have a Bootcamp partition so I could check if it worked in Windows. That worked like a charm, so no issues at all. But I can't find a way on how to get it working in High Sierra.

What I tried till now:

- I had a 6-pins pcie connector plugged into the 8-pins on the videocard, so I added a 6-pins to 8-pins adapter so the other two pins had power too. Still, no difference. I know a proper 2x 6-pins to 1x 8-pins adapter should be better, but since it works in Windows (also when gaming) I don't think the power is an issue.
- I checked the product ID (0x67DF1002) in windows and checked if it was listed in the kext (AMD9500Controller.kext), and it was.
- Filevault is OFF.
- The original BIOS is loaded, also checked this with the seller.
- I checked all ports: DVI, 2x DP, 2x HDMI - they all result in the same slow blinking screen. (however, when using DVI the white screen is a bit green)
- Enabled screen sharing, and tried to see if I would be able to connect to it via vnc. I got a login prompt once, but couldn't connect.
- Added an old 8800 GT, together with the RX 580 and tried to boot. I got the bootscreen, and the progress bar but that never finishes and I got into a boot loop in this configuration.

I'm not sure what to do next. Does anybody has an idea? Any help will be really appreciated. :)
 
Last edited:

Saaihead

macrumors newbie
Original poster
Nov 10, 2018
5
2
Thanks for your reply! I hope you're kidding me right? Haha, well f*ck me. So if there is no other way to get this working, which cards are supported? Or could a processor upgrade do?
 

Saaihead

macrumors newbie
Original poster
Nov 10, 2018
5
2
That's just too bad. So for now I'm stuck in Windows, at least I'm able to play games. And I'll be on the lookout for a 4.1 or 5.1 for christmas.

And it is possible to run Mojave on a 3.1, but you need a patcher. I actually had it on there for a couple of days to see how it would perform without graphics acceleration. I had to put in a new Wi-Fi / BT card, but besides the crappy graphics it worked fine.
 

Saaihead

macrumors newbie
Original poster
Nov 10, 2018
5
2
Thanks for replying Lou. The thing is, I already sold my GTX 1060... haha.
 

sojab0on

macrumors newbie
Apr 30, 2019
3
0
I think he refers to the dosdude patcher.

I had an wx7100 without acceleration in high serra with native drivers.
Could not get the acceleration working.
 

Project Alice

macrumors 65816
Jul 13, 2008
1,053
716
Post Falls, ID
I had a Sapphire Rx480 in my 3.1. That worked nice with patched High Sierra.
I'm not aware of any patches for a 3,1 that can make AMD cards work.
I think he refers to the dosdude patcher.

I had an wx7100 without acceleration in high serra with native drivers.
Could not get the acceleration working.
The dosdude patch installs the unsupported OS, but does nothing for the SSE4.2 problem with the AMD drivers.
 

tsialex

macrumors 604
Jun 13, 2016
7,648
8,358
Brazil
I'm not aware of any patches for a 3,1 that can make AMD cards work.

The dosdude patch installs the unsupported OS, but does nothing for the SSE4.2 problem with the AMD drivers.
High Sierra Patcher installs Sierra AMD drivers and RX-580 kinda works with High Sierra. This don't work anymore with Mojave.
 

tsialex

macrumors 604
Jun 13, 2016
7,648
8,358
Brazil
That Apple should be able to do it if they cared?
Do you really think that Apple needs to use outdated instructions sets with a macOS released 2 years after the end of software support for early-2008 Mac Pros?

Look the other side, if you own a iMac 2019, you still wants drivers for your GPU using 2006 era instruction sets and compilers?

Xeon Woodcrest is a Penryn generation C2D CPU. Nothing should be compiled nowadays to support it.
 

cube

Suspended
May 10, 2004
16,983
4,968
Do you really think that Apple needs to use outdated instructions sets with a macOS released 2 years after the end of support of early-2008 Mac Pros?

Look the other side, if you own a iMac 2019, you still wants drivers for your GPU using 2006 era instruction sets and compilers?

Xeon Woodcrest is a Penryn generation C2D CPU. Nothing should be compiled nowadays to support it.
We have a 2008 MBP. Of course we would like to be able to run the latest OS.

I have not bought a new Mac since 2011 since Apple stopped making any laptop that fits.
 

tsialex

macrumors 604
Jun 13, 2016
7,648
8,358
Brazil
We have a 2008 MBP. Of course we would like to be able to run the latest OS.

I have not bought a new Mac since 2011 since Apple stopped making any laptop that fits.
Why this anything to do with early-2008 Mac Pro? If you bought a Mac you clearly know the 7-year software support window. Now, it’s 2019 with totally different hardware, with totally different use cases. macOS is not Windows and Apple have totally different business decisions.
 

cube

Suspended
May 10, 2004
16,983
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Why this anything to do with early-2008 Mac Pro? If you bought a Mac you clearly know the 7-year software support window. Now, it’s 2019 with totally different hardware, with totally different use cases. macOS is not Windows and Apple have totally different business decisions.
No, I did not know about any software software support window or that Apple would be so bad at releasing new hardware.
 

cube

Suspended
May 10, 2004
16,983
4,968
It's have been Apple software support polices since at least the Intel era…
The Cube was my first Mac. And I did not know anything about an Intel support window until our 2008 MBP got obsoleted.

I did now that Apple was not great at coming up with new hardware since I waited until 2009 to replace it with a 15" 2008 MBP because ExpressCard was removed and I bought the 2011 MBP in 2012 when the 17" got discontinued.
 
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