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Did you ever get sleep working? I'm running a near-identical setup and having sleep, airdrop/imessages/facetime and hardware acceleration not working. Have you got anywhere with those?

False alarm: it appears that hardware acceleration isn't working: I have agdpmod=pikera shikigva=128 in my boot-args, but nothing happening. So what to try now?

I can, and I did. So far, so good - no video glitching since, although for some reason performance on BlackMagic 8K RAW is down a lot. But that shouldn't be the cause, as the Radeon VII is a Gen 3 device anyway. AFAIK, the Asrock UEFI only affects the PCIe 16x slot, not the internal M.2 Gen 4...

Opencore 0.6.0 build using: Asrock X570 Taichi/latest BIOS (3.2 IIRC) 3900X 2xSabrent PCIe 4 1TB SSDs 64GB Patriot Viper Steel DDR4@3200MHz Sapphire Radeon VII Corsair RM850X PSU Corsair 570X RGB Case Mostly working very well, but I have: persistent stutter, audio sync and freezing issues on...

Nice job. +1 on Xcode, and do you need to patch to run Adobe CS?

I'm planning a virtualised 3900X build under Catalina in order to test the water before lashing out on a Threadripper 3 system, so looking for advice on: appropriate X570 motherboards that support Thunderbolt 3 & at least 2 M.2 NVMe slots I'm planning an Ubuntu host, so KVM/QEMU or Proxmox (or...

Just joined, as part of research to build a multiboot Threadripper 3 machine - MacOS, Windows 10 & Ubuntu needed. Looks like I may be a little ahead of myself wrt support for 19h/TRX40 systems, and trying to decide if best to use three boot partitions after support becomes available or use...