[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

[evlthoma]

You didn't mention which Broadcom WiFi/BT hardware and macOS version you are using. Do you have a Fenvi FV-T919 or something else? Do you have any broadcom patches or kexts like AirportBrcmFixup installed?

Your System Report > WiFi does not show "Auto Unlock: Supported", which could indicate missing support for the Apple Watch unlocking feature.
EDIT: Apple Support page How to unlock your Mac with your Apple Watch confirms this, see spoiler

Spoiler: Verify support for Auto Unlock

View attachment 463428

I also see other small differences that indicate you have different Broadcom hardware. See screenshot below of my WiFi settings (Fenvi FV-T919 on macOS 10.15.4) highlighting differences compared to your screenshot.

I'm just noticing the differences, which hopefully help you in the right direction.
View attachment 463408

Regarding Sidecar not working:
Could be related to your WiFi, but you may try setting shikigva=80 in your Clover Configurator > Boot arguments. This has solved SideCar issues for some.

CaseyJ, confirmed location services:

 

[evlthoma]

You didn't mention which Broadcom WiFi/BT hardware and macOS version you are using. Do you have a Fenvi FV-T919 or something else? Do you have any broadcom patches or kexts like AirportBrcmFixup installed?

Your System Report > WiFi does not show "Auto Unlock: Supported", which could indicate missing support for the Apple Watch unlocking feature.
EDIT: Apple Support page How to unlock your Mac with your Apple Watch confirms this, see spoiler

Spoiler: Verify support for Auto Unlock

View attachment 463428

I also see other small differences that indicate you have different Broadcom hardware. See screenshot below of my WiFi settings (Fenvi FV-T919 on macOS 10.15.4) highlighting differences compared to your screenshot.

I'm just noticing the differences, which hopefully help you in the right direction.
View attachment 463408

Regarding Sidecar not working:
Could be related to your WiFi, but you may try setting shikigva=80 in your Clover Configurator > Boot arguments. This has solved SideCar issues for some.

iRamon, all good questions! The easy one is Catalina 10.15.4 (19E287). I purchased the hardware using links from Mojave golden build about a year ago. The WiFi+bluetooth card does not look like what is the amazon description below, which is one of the reasons (along with the differences you point out) that I suspect I have the wrong hardware.

Running the Bluetooth Kexts from this thread.

WiFi+bluetooth:
https://www.amazon.com/gp/product/B07F74Z2PZ/?tag=tonymacx86com-20

Adpater:
https://www.amazon.com/gp/product/B076KBBFV4/?tag=tonymacx86com-20

I'm currently using shikigva=16 I'll try shikigva=80 and report back

 

[faithie999]

View attachment 463424

Is your GoFlex adapter the original (TB1) model or is it a later version? I have the original version, and it shows up as vendor 0x16 and device 0x2000 whereas yours is device 0x1000. I bought an Alpine Ridge AIC for TB1 compatibility, but if you are getting TB1 compatibility with your Titan Ridge AIC it's good to know!
Thanks.

 

[evlthoma]

iRamon, all good questions! The easy one is Catalina 10.15.4 (19E287). I purchased the hardware using links from Mojave golden build about a year ago. The WiFi+bluetooth card does not look like what is the amazon description below, which is one of the reasons (along with the differences you point out) that I suspect I have the wrong hardware.

WiFi+bluetooth:
https://www.amazon.com/gp/product/B07F74Z2PZ/?tag=tonymacx86com-20

Adpater:
https://www.amazon.com/gp/product/B076KBBFV4/?tag=tonymacx86com-20

I'm currently using shikigva=16 I'll try shikigva=80 and report back

Same results with shikigva=80

 

[gandem]

You know, I just always assumed it was TB1 because I bought it back with my old 2011-17inch MBP which is TB1. I still have that tank btw, it works flawlessly! The model I have is SRD0001. This thing has always worked with my gc-titan ridge card even before flashing-bootable. Hot swap capable thanks to @CaseySJ- again, before flashing.

 

[CaseySJ]

Same results with shikigva=80

Are you using SMBIOS iMac19,1?

The Amazon link to your WiFi/BT card does not seem quite right -- the link shows a mini-PCIe to M.2 adapter instead of the actual Broadcom WiFi/BT card.

 

[evlthoma]

Are you using SMBIOS iMac19,1?

Correct. I actually started from scratch and used your clean Catalina install mini guide thinking maybe the issue was with my original Mojave to Catalina build.

 

[n19htz]

Do you still need GC-Titan Ridge activation on Windows before using it on Mac?

 

[DocMeattey]

Thanks, CaseySJ. Here are the screenshots you requested:

 

[gandem]

So I seemed to have completely lost dual monitor support since flashing to modified NVM50. 4K monitor will only work if 2nd HD-HDMI monitor is unplugged, and vice-versa. I'm running the latest WEG and LILU and this was working although somewhat deprecated using modified NVM23.

With unmodified firmware- could run 2 monitors over thunderbolt via TS3 dock.
With modified NVM23- Had to move HDMI monitor directly to GPU.
With modified NVM50- Only 1 monitor will run at a time.

EDIT:
I have restored dual monitor support by changing "boot support" to "boot once" in the bios thunderbolt settings. Both monitors are back running off TS3 Plus dock, but I have now lost boot screens. I have clover boot after 5 secs so not a problem for now, but I worry about performing updates and selecting the right boot drive.