Gigabyte Z490 Vision D (Thunderbolt 3) + i5-10400 + AMD RX 580

Was there one today? The latest I can see is:-

macOS Catalina 10.15.7 (19H4) - 001-57224 - Added 2020-10-27 17:28:13

It's showing here in my Software Update pane.


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I always do so, but no usb of tb.
Please run IORegistryExplorer --> File --> Save As... and post the saved file. That will show us the Thunderbolt configuration.
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I apologize for what might be slightly off topic, but I'm desperate. I ordered the parts on page 1 (except a I7 10700) and have have been trying to assemble them. Right now I'm at the stage with the cpu, 1 stick m2 storage, 1 memory stick. When I hook up the power, I get a brief flash and nothing else. I've swaped motherboards, cpus, power supplies, M2 storage and memory DIMM. No difference. What am I doing wrong?

(for reference, I had no trouble building the flash drive for doing the install, but obviously I cant do that until I can get something to turn on.)

And yes I tried googling for this issue and got nowhere...
Have you connected the power switch of your case?
Switching on the external power supply is not enough ;)

I am not a member of Apple Developer Program and yet I received this, which indicates that the Release Candidate is also a public testing release...
Release Candidate installed: Build 20B5022a
Screen Shot 2020-11-05 at 3.45.49 PM.png
Update: The screenshots show you're using iMac20,2. Please try switching to iMacPro1,1 for a few days and disable the Device Property for iGPU as shown:

View attachment 494019

hey Casey:

My build is using iMacPro1,1 and I have the Device Property for iGPU enabled. Everything seems to be running smooth. Should I disable the entry?