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iM 4,1-14,4 2011 iMac Graphics Card Upgrade

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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
rolandopr said:
Im trying to get a AMD W5170M to show on display but screen is blank, connecting a mini DP on an external monitor works but when installing Sonoma with OCLP it goes blank after first restart.
Click to expand...
You may need an efi boot screen mod…

github.com

GitHub - Ausdauersportler/IMAC-EFI-BOOT-SCREEN: How to create an EFI boot screen vBIOS for Apple Late 2009 to Mid 2011 iMac systems using AMD MXM graphics cards

How to create an EFI boot screen vBIOS for Apple Late 2009 to Mid 2011 iMac systems using AMD MXM graphics cards - Ausdauersportler/IMAC-EFI-BOOT-SCREEN
github.com github.com
 
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