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Have you found a solution yet? I encountered the same problem.

Friend, I hope my poor English has not caused you any trouble I really want to find a solution to this problem.

On another forum, I got the answer that, because Hackintosh does not have T2 chip decoding, there is no way to use mirror to TV with SMBIOS like iMacPro1,1.

Do you mean it is normal for your Z390 system to use SMBIOS iMacPro1,1 to mirror to Appletv4k? I found the EFI you shared: EFI OpenCore 0.9.1 Z390M.zip May I ask if you are using the Monterey OS?

Thanks for your help! Can you share your EFI for comparison? I'll see if it's possible to upload the EFI of my own machine. If you're free, could you please help me check if there's a configuration issue. thank you!

BIOS disable IGPU, config SMBIOS to iMacPro1,1, DRM everything is normal. And mirroring from iPhone and iPad to Mac OS is normal, but mirroring from Mac OS to iPad and Appletv4K has failed. I can't figure out whyo_Oo_Oo_O

I have tried this and there are no issues with iMacPro1,1 DRM, but it is mirrored on Appletv4K and the TV screen is black

I have tried this and there are no issues with iMacPro1,1DRM, but it is mirrored on Appletv4K and the TV screen is black

Yes, Airplay is working properly

Thank so much ! After going home today, I followed your prompts and made the necessary modifications. Even without using instructions, I was unable to use the TV.app. Just click on play and it will flash back

I have tried, but it has not resolved the issue of TV and AppleMusic not working properly. This is the configuration of IGPU: <key>PciRoot(0x0)/Pci(0x2,0x0)</key> <dict> <key>AAPL,ig-platform-id</key> <data> AwCRPg==...

thank so much! I am currently using iMac19,1, and the airplay function is normal. However, Appletv and AppleMusic cannot function properly. use: defaults write com.apple.AppleGVA gvaForceAMDKE -boolean yes It can solve the above two problems, but sometimes there may be situations where airplay...

Ladies and gentlemen, let me apologize first! I come from Shenzhen, Guangdong, China, and my English is not good. I encountered the same problem. Monterey 12.6.5, SMBIOS: iMacPro1,1 and MacPro7,1 have both tried and mirrored to ATV 6th black screen, but we have been unable to find a solution...

Have you solved this problem?