@CaseySJ So I decided to do a brand new clean install of Catalina, but rather than just running an updated, I wanted to essentially start everything from scratch.
I followed the build guide step-by-step and got everything running beautifully. But just as before, I have one bizarre issue: my CPU is pretty much idle non-stop. It hovers around 85%–95% idle. Opening apps takes quite a while, various tasks take much longer than they should on a powerful machine like this. I pretty much never see any spike in CPU load in Activity Monitor. Any ideas as to why this may be?
My setup:
Gigabyte Z390 Designare f6
Intel Core i9-9900K
AMD RX 580 8 GB
64 GB 2666 MHz DDR4
Model Identifier: iMac19,1
Internal Drive: Samsung SSD 860 EVO 1TB
In BIOS: XMP Profile is disabled and the multiplier is set to DDR4-2666
Would REALLY appreciate the help.