[Success] AMD RX6000 Series working in macOS

[ARES777]

Hello everyone,

For me I get a black screen under DP or HDMI with my Sapphire RX 6800 XT OC with to without WE :/
Tried to disable the iGPU of my 9900K and injections bu nothing.

Same here on Gigabyte 6800XT. Playing with hdmi dp, not working, no monitor detected

 

[switt]

Thread name should be changed from failed to success
Good news.

Not just good... Great news!

 

[Gigamaxx]

Same here on Gigabyte 6800XT. Playing with hdmi dp, not working, no monitor detected

boot arg. agdpmod=pikera

 

[goldorac]

Just disabled WE and switched to MacPro7.1, working without problem now.

 

[ARES777]

Just disabled WE and switched to MacPro7.1, working without problem now.

Changed System to 7,1 also here, now works.

 

[TexTokyo]

Changed System to 7,1 also here, now works.

Are either you or @goldorac running a multi-monitor setup? If so, is it stable?

 

[ARES777]

Are either you or @goldorac running a multi-monitor setup? If so, is it stable?

I have 2 monitors Gigabyte 27", 2K, works flawless, on 144 Hz. Is stable for me with 7,1 definition, no WE enabled, and pikera as boot arg. Both monitors on DP port, since the HDMI I use for a 21" graphic display drawing tablet ( Gaomon Pd2200 works also fine is seen as 3rd screen)

 

[TexTokyo]

I have 2 monitors Gigabyte 27", 2K, works flawless, on 144 Hz. Is stable for me with 7,1 definition, no WE enabled, and pikera as boot arg. Both monitors on DP port, since the HDMI I use for a 21" graphic display pen (works also fine is seen as 3rd display).

Oh interesting, no WE.

I'm kicking myself (a little). I have a 6800 (non-XT) sitting here for months, waiting for support. I've been running a Sapphire 5700 XT in a new build since last summer, but ever since 11.3 have been dealing with green screens multiple times per day (like 5+). This week, because I couldn't stand the green screens any more, and didn't know if 6800 support was actually ever going to come, I dropped US$410 on a used RX 580. Running blissfully stable.

Guess, I'll try the 6800 now, for a few days, and if it is stable, sell off the RX 580 and 5700 XT.

Thanks for the quick feedback on the multi-monitor, I've got dual 4K's that I typically run at 3008x1692.

 

[wessberg]

Just wanted to share that I too had success with a 6900 XT on OpenCore 0.6.8. I didn't have to change to MacPro7.1 from an iMac19.1. Yay!

 

[TheBloke]

Now that 11.4 beta 1 is on the public seed:

My 6900XT findings so far, tested on X299 i9-10980XE.

1. agdpmod=pikera required to avoid black screen on boot, including on MacPro7,1 SMBIOS.
   1. No surprise as the X6000 kext series has been re-used for Big Navi.
   2. I haven't tested without WhateverGreen.
2. Multi-monitor works perfectly. I have four monitors connected.
   1. I'm using: 2 x DP, 1 x HDMI, 1 x USB-C to DP
   2. One monitor is 3840x2160, other three are 1920x1200. All are 60hz.
3. H264/H265 encode/decode are both working fine.
4. HDMI/DP sound is working.
5. Sleep/wake is working fine.
6. Fans seem OK so far: still when the card is idle, spinning up when it's not.
7. Benchmarks:
   1. GeekBench 5.4 Metal: max 183k, lowest 160k
   2. GeekBench 5.4 OpenCL: max 122k, lowest 111k
   3. Octane X "Chess Set Procedural" : 11 seconds
      1. Compared to: Radeon Pro Vega II - 18s; Radeon VII - 19s; NVidia 2070 - 19s; 5700XT - 21s
      2. This result is particularly pleasing - nearly double the performance of the 5700XT, and 40+% faster than the Radeon Pro VII and standard VII.
      3. I'd love to see a figure comparing it to a 3080 on CUDA, I reckon it'd be close.

So far, looking good!