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With Big Sur and OC 0.6.7, shikigva settings are ignored. Instead, try SMBIOS for iMac15,1 with a device property for your RX580 set to unfairgva number 7.

Input on OC 0.6.8 I installed OC 0.6.8 and the new kexts. In my first try, I used the OpenHfsPlus.efi instead of HfsPlus.efi, and I failed to update the Resources folder. It booted ok, but I lost OpenCanopy and had the text-based OS selection. On the second try, I went back to the HfsPlus.efi...

MiniBUU and Taskrov, In post #1007 here, I posted an EFI for the latest Big Sur with SMBIOS set to iMac15,1 and OC0.6.6 which includes a working USBPorts.kext for this SMBIOS. No renames are necessary, and USBInjectall is not used. I looked at Taskrov's, but I don't have any good experience...

Could you post your config.plist with the serial number removed?

As far as USBMap.kext, I think you can adopt one of the provided USBPorts.kext to fit your system. You may have to modify the Info.plist inside of the Contents folder of the kext to fit your SMBIOS, and Hackintool can produce a prototype kext for you. Hackintools and USBMap tools aren't so...

With my RX 570 it fixed a similar problem by setting ReconnectOnResChange to true in the config.plist.

67BGTEV, At the present time, I have two groups of HP 8300 machines. The first group has Nvidia GT730 graphics cards and i5-3470 CPU, and they are configured as iMac13,2 with macOS Catalina 10.15.7 and OC 0.6.6. Here is a copy of the EFI for this first group. If you have a different CPU you...

When I first updated to OC 0.6.6, I used the new drivers, but I had the same mistake as the sample.plist, in that it listed driver HfsPlus.efi, but I had changed over to the new OpenHfsPlus.efi instead, and it caused it to hang before the boot picker was displayed. It doesn't sound like your...

They deleted the BootProtect key from the config.plist in OC 6.6, as should you. The Bootstrap directory in EFI/OC was deleted also. Did you run ocvalidate from the Utilities directory to check that you had all the new keys for OC 6.6? The new default values in their Docs/Sample.plist worked for me.

If you look at the section of top-level code called kern_weg, you'll see that in Big Sur, the two sections of code called kern_cdf and kern_shiki are bypassed, and kern_unfair is run instead. Kern_cdf manages the cdfon boot option and enable-hdmi20 device properties (no longer available in Big...

My RX 570 was booting to black screen during the picker process and would return to normal operation towards the end of Apple's progress bar when the only monitor was on HDMI. If I plugged a second monitor into DVI, or plugged my single HDMI monitor into a Dataport to HDMI adapter, I didn't see...

New Big Sur DRM Method in OC 0.6.5! (updated twice 1/11) This is new and not thoroughly tested, but we have a new WEG DRM method for Big Sur. I first got it working with an i5-3570K HP 8300 CMT with a MSI 4 GB RX 560 LP graphics card, configured with SMBIOS of iMac15,1. I tested it again today...

The BIOS details are listed under previous versions here: https://support.hp.com/us-en/drivers/selfservice/hp-compaq-elite-8300-convertible-minitower-pc/5232845/model/5232846?sku=QV993AV Version 3.08 was mostly security updates I think.

I have a very similar system with i5-3570K RX 570 SMBIOS IMP11 OC 0.6.5 With IGPU off, I can download AppleTV mpeg files, and then play them afterwards. I can't stream or play AppleTV HLS files. VideoProc shows 4K HEVC and H264. Hackintool says VDADecoder is fully supported. HEVC files, like...

I have a similar problem with Big Sur on my HP 8300 with RX 570. My main monitor is plugged into the HDMI port. If it is the only monitor plugged in, it goes dark before the OC picker, and only lights up again towards the end of the boot process. I find that if I plug a second monitor into the...

What SMBIOS, macOS, and DGPU are you testing on?

DRM testing with OC 6.5, iMac15,1 SMBIOS, and Catalina 10.15.7 I tried a number of combinations with IGPU off, headless, and connector-full, using various default and shikigva settings. I tested with an i5-3570K with HD 4000 graphics, and a 2GB RX560, an MSI Aero ITX. In my opinion, the best...

Big Sur DRM testing As @Asural and @Sniki have pointed out elsewhere, there is new information on the Whatevergreen website about DRM in Big Sur, copied below. I've tested the info on my Big Sur 8300s with i5-3570K HD 4000 Graphics IGPU and RX 560 or RX 570 DGPU, one with iMacPro1,1 SMBIOS, and...

For SMBIOS mapping to PlatformInfo, google "Dortania SMBIOS" which has a nice list of Board-IDs versus common model name. You can use the CorpNewt's GenSMBIOS to generate an appropriate serial number and UUID. Don't forget to check Apple Coverage so that you don't reuse someone else's serial...

I believe you can get a free account and/or free downloads on AppleTV, so it seems that it shouldnt be hard to check.