Tridon

@Hervé Thank you for the suggestion of using screen sharing, I did that successfully ! I've tried it with 07009B3E, first with the external display connected and then with the external display disconnected. On both attempts, I get a black screen. I'm attaching those ioreg dumps here. Curiously enough, as you'll see from 'iMacremote', there is no display detected. So, the internal display is just not getting detected. What I cannot understand is how the internal display works with an invalid framebuffer. I've tried to read this : https://dortania.github.io/OpenCore-Post-Install/gpu-patching/intel-patching/busid.html and apply it but again, I must be doing something wrong. What else can I try ? The more challenging this gets, the more I want to fix it ! iMacremote.ioreg iMacexternalmonitor.ioreg

I've tried your advice of every framebuffer for CoffeLake UHD 630 but only have a black screen. Booting with an invalid framebuffer (12345678) magically works on the internal display, though it is without acceleration. Can i extract the bus id + pipe from a ioreg dump(attached below) here and then use it for correctly patching the framebuffer ? iMac12345678.ioreg

I wanted to try and troubleshoot this by myself (and learn in the process) but I'm still struggling. I've tried reading every guide and forum post that I thought would help, but obviously, I am doing something wrong. I tried it again by changing to iMac19,1 SMBIOS and both the recommended device-ids : 3E9B0007 / 3EA50000 3E9B0007 : External display lights up, internal display switches off after the first few seconds 3EA50000 : Gives an error, cannot boot to desktop. Basically, when an invalid framebuffer(example : 3E920000) is supplied, the internal display lights up and the external display is cloned, however, there is no graphic accceleration (7 MB issue !) When supplied with a correct framebuffer,(example : 0000923E, 07009B3E) graphic acceleration is enabled but only the external display works, with the internal screen switching off. Any ideas what I could do next ? I believe, I have to do the correct framebuffer bus patching but I cannot figure it out. Would it be be possible to examine my ioreg files that I posted earlier and point me in the right direction ?

Hi, I have a similar issue as discussed here with an All-in-One and have followed the suggestions, but I am unable to get the internal display to work. If I have graphic acceleration enabled, the internal display switches off 4 seconds into boot and the external display connected over HDMI works fine and is detected by Hackintool. I have taken a ioreg dump here, labeled "MM_with_external_display_only.ioreg". If I disable graphic acceleration (by choosing an invalid platform id) the internal and external display (which is cloned/mirrored) are working but only the internal display is listed under Hackintool/Settings>>Display. I have taken another ioreg dump here, labeled "MM_with_accel_disabled_and_internal_display.ioreg". It feels as though I am staring at the answer, but for some reason, I just can't make this work with both displays and graphic acceleration enabled neither can I make it work with acceleration enabled on the internal display. I have read (and tried) framebuffer bus patching though I might've done it incorrectly. I have tried injecting my internal display EDID to no avail. Is there anything else that I can try ? HP AIO, i7-8700T (UHD630) on Q370. EDID Info.zip MM_with_external_display_only.ioreg MM_with_accel_disabled_and_internal_display.ioreg EFI.zip