Default settings: iMac18,2, No GUI, No Picker, HiDPI (2x), Power Nap On
macOS Version: Big Sur 11 (Beta, 20A5364e)
This is the last update, because I have replaced the motherboard to Maximus VIII Hero (Z170 chipset).
| Hardware | Model |
|---|---|
| CPU | i3-6100 (XCPM+HWP by CPUFriend) |
| GPU | Intel HD Graphic 530 (no-connector, ig-platform-id: 0x19120001) + Sapphire AMD RX470D (VBIOS RX570, PCI-e Slot-1) |
| SSD | Apple SSD SM0128G (M.2 in use) |
| Memory | DDR4 2400 8GB (Running at 2133 MHz, BANK0/DIMM0) |
| Soundcard | Onboard Realtek ALC1150 (alc-layout-id: 3) |
| Motherboard | ASUS B150 PRO GAMING (Latest UEFI BIOS) |
| Wi-Fi Card | Apple BCM943602CDP (4 antennas, 802.11a/b/g/n/ac, Simultaneous dual band (2.4GHz & 5GHz), HT80 with 3x3 MIMO, used by iMac Intel 21.5” or 27” (Mid 2015-2019)) |
| BIOS Setting | Value |
|---|---|
| Intel VT | Enabled |
| Intel VT-d | Enabled |
| X.M.P. | Profile#1 |
| Native ASPM | Enabled |
| CFG Lock | Disabled |
| Above 4G Decoding | Enabled |
| Memory Remap | Enabled |
| iGPU Multi-Monitor | Enabled |
| DVMT Pre-Allocated | 128M |
| ErP Ready | Enabled (S4+S5) |
| Intel LAN Controller | Enabled |
| Power On By PCI-e/PCI | Enabled |
| Legacy USB Support | Disabled |
| USB Keyboard and Mouse Simulator | Disabled |
| Fast Boot | Disabled |
| POST Delay Time | 0 sec |
| Launch CSM | Disabled |
| OS Type | Other OS |
No Problem!
Update 2020-07-01: Disable Fast Boot in UEFI BIOS, or break your UEFI BIOS, but you can reset nvram to resolve it
Sidecar or DRM
If you add shikigva=80 to boot-args, Sidecar works but not perfect (frame blur), DRM OK.
Or do not do anything, use default config, Sidecar works perfect, but DRM doesn't work.