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[Success] AMD RX6000 Series working in macOS

I have UHD 630, Radeon™ 64 LC and RX 6900 XT activated, but I have picture dropouts.
Do I have to remove the UHD 630 and the Radeon 64™ LC?
No you don’t need to, you leave it in there. In the Device Properties list for the UHD 630 just find and change the AAPL,ig-platform-id by changing the value to 0300923E, device-id to 923E0000 and adding framebuffer-patch-enable with value of 01000000 - this will turn the iGPU output into headless mode and enable Intel Quicksync.

For the picture dropouts, maybe try using shikigva=128 in the boot-args.

For convenience you can disable the 64 LC in BIOS by going to the relevant card‘s PCIe slot and selecting Storage mode before booting into your OS of choice. That way it leaves you to still be able to use the card when you want without having to physically take it out.
 
Thanks for that...I wasn't aware of it. I know most folks use agpdmod=pikera these days. Considering it's referenced in the Dortania guide, I didn't expect that.
agpdmod=pikera only fixes black screen for certain GPUs, not related to DRM functionality.
 
Do you have a full backup? Also I find that if you have a spare drive with enough space, you could clone it using CCC or SuperDuper, and then make sure to move over the EFI folder as well. Then you can do the update to 11.4 via USB drive and test it out. I would also prob before doing the update, sign out of all Apple ID (iMessage, FaceTime, iCloud), as you will most likely be maybe using a different SMBIOS, and you do not want to be signed in when switching. PM, me if need any help. I just did the 10.13.6 (TitanXP) to 11.4.1(6900xt) on my hack. Everything went perfectly!
It’s weird I didn’t get a noti for this response. Thank you. I have a cloned drive already. I’m gonna wait for 11.4 to released and then make the switch. I will dm you when I decide to do it!
 
Anyone else had a big drop in GPU performance in 11.4 public beta 2 ? I was getting 178000 in metal on Beta 1 and now only getting 145000 in Beta 2... I have the MSI 6800xt Gaming x Trio
 
hello guys any of you test a transcoding to proress lt in davinci resolve or any kind of test doing transcoding? with 6800xt or 6900xt ? i will buy this card soon.
 
No idea where you're based. But for people in the UK; since yesterday Overclockers have a fair bit of stock, Scan as well, but less stock. Overclockers prices are around £1200 for a 6800XT, £1700–£2400 for a 6900XT.
US. Would prefer to pay less for a GPU than for a used honda.
 

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hello guys any of you test a transcoding to proress lt in davinci resolve or any kind of test doing transcoding? with 6800xt or 6900xt ? i will buy this card soon.
Most of decoding and encoding is done by CPU in Resolve ... ProRes is one of them.
What Kind of file do you transcode from ?
What kind of CPU do you have ?
 
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