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

[starchyfind]

Oh yes, I need to reword that sentence. As long as the Windows SSD contains an EFI partition, then everything's okay. Technically it does not matter which OS is installed first. It only matters that the Windows SSD contain its own EFI partition.

Not to hijack this, but I've been struggling with a self-inflicted issue for the past couple of months regarding my dual boot system (actually triple boot with Catalina, Big Sur, and Win10). In Windows, I stupidly let the Gigabyte App Center garbage utility update everything that was out-of-date (without checking) and pretty well broke a few things in both macOS and Windows. I think it installed the Optane drivers and some other things (I might be crazy, but it seemed like it updated/flashed something on the motherboard itself).

My hack will no longer shutdown or go to sleep. It attempts to sleep, and then immediately wakes up. When I shutdown, it starts right back up. I can also no longer boot from windows from OC, but I can when changing the boot drive via the BIOS.

So at least part of the issue is the EFI partition on the Windows SSD. Not sure that explains the odd shutdown sleep behavior.

I've flashed the BIOS multiple times using different versions. Reset CMOS. I've updated to the latest OC multiple times. The only thing I haven't tried is reformatting everything and starting over.

Any troubleshooting ideas?

 

[CaseySJ]

Got it!

I looked at your EFI folder. It seems you used the folder for Vision D and made some changes. It's better to use the OpenCore 0.6.9 folder for Vision G (attached).

I've already transferred your PlatformInfo credentials into config.plist. You may simply rename the folder to EFI and copy it to the EFI partition of your USB install drive. Then see if the macOS installer starts up.

 

[dehjomz]

Either iMac19,1 or iMac20,2 (not 20,1) is okay. If you're running latest Catalina or Big Sur, iMac20,2 is probably the most appropriate choice.

Might I ask why the preference for iMac20,2 vs iMac20,1?

 

[CaseySJ]

Not to hijack this, but I've been struggling with a self-inflicted issue for the past couple of months regarding my dual boot system (actually triple boot with Catalina, Big Sur, and Win10). In Windows, I stupidly let the Gigabyte App Center garbage utility update everything that was out-of-date (without checking) and pretty well broke a few things in both macOS and Windows. I think it installed the Optane drivers and some other things (I might be crazy, but it seemed like it updated/flashed something on the motherboard itself).

My hack will no longer shutdown or go to sleep. It attempts to sleep, and then immediately wakes up. When I shutdown, it starts right back up. I can also no longer boot from windows from OC, but I can when changing the boot drive via the BIOS.

So at least part of the issue is the EFI partition on the Windows SSD. Not sure that explains the odd shutdown sleep behavior.

I've flashed the BIOS multiple times using different versions. Reset CMOS. I've updated to the latest OC multiple times. The only thing I haven't tried is reformatting everything and starting over.

Any troubleshooting ideas?

Although you've reinstalled the BIOS, let me ask anyway whether SATA port configuration in BIOS is back to AHCI instead of Intel Optane?

Does the sleep and shutdown problem occur in Windows as well, or only in macOS?

 

[CaseySJ]

Might I ask why the preference for iMac20,2 vs iMac20,1?

This is based on frequency of users in this thread who have chosen 20,2. Technically, the differences between 20,1 and 20,2 may not be relevant for @Arron because he's using iGPU exclusively.

• iMac20,1 --> uses Radeon Pro 5300 and Radeon Pro 5500 XT
• iMac20,2 --> uses Radeon Pro 5700 XT

 

[starchyfind]

Although you've reinstalled the BIOS, let me ask anyway whether SATA port configuration in BIOS is back to AHCI instead of Intel Optane?

Does the sleep and shutdown problem occur in Windows as well, or only in macOS?

I just flashed the BIOS again yesterday, but forgot to check, but in the past I had ensured SATA port configuration was AHCI and not Intel Optane sadly to no avail.

Sleep and shutdown problem occurs with both Windows and macOS.

 

[xtreem.p]

With my Z490 I'm using RX580 4GB and SMBIOS 10.2. HEVC,YT 4K Videos are all accelerated. Using iGPU as compute.

EDIT: Typo 20,2

 

[CaseySJ]

With my Z490 I'm using RX580 4GB and SMBIOS 10.2. HEVC,YT 4K Videos are all accelerated. Using iGPU as compute.

Do you mean iMac20,2?

 

[CaseySJ]

I just flashed the BIOS again yesterday, but forgot to check, but in the past I had ensured SATA port configuration was AHCI and not Intel Optane sadly to no avail.

Sleep and shutdown problem occurs with both Windows and macOS.

Some more comments:

• We should stay with BIOS F5 for the time being.
• When you configure BIOS, do you start with F7 (Load Optimized Defaults)?
• Have you tried disconnecting components such as WiFi/BT card to see whether that makes a difference in Windows or macOS?
• What components are connected to the internal USB 2.0 headers?

 

[dehjomz]

This is based on frequency of users in this thread who have chosen 20,2. Technically, the differences between 20,1 and 20,2 may not be relevant for @Arron because he's using iGPU exclusively.

• iMac20,1 --> uses Radeon Pro 5300 and Radeon Pro 5500 XT
• iMac20,2 --> uses Radeon Pro 5700 XT

Oh gotcha. Just curious. I’ve seen quite a few people recommending the same, but I wasn’t sure what issues they faced. I’ve been using iMac20,1 since last year without any issues, even on z590, and was just wondering if I should change as well. I guess it's like they say, if it ain't broke...