Back then it didn't stop at "PCI configuration error" or I could get passed that with npci=0x2000 or something like that. If this can help, I remember having successfully used my Radeon Mobility with this computer with older versions of MacOS (10.6 or 10.7). Maybe I could remove some kexts from S/L/E which maybe stops MacOS from starting (even though it starts perfectly with switch mode activated in the BIOS). Maybe I could try to apply some patches to my DSDT but I don't know which one. ![]() ![]() I extracted my DSDT with F4 at Clover boot loader and loaded it in MasiASL, fixed the compilation errors thanks to a post of someone that had almost the same motherboard (Acer 3410t I think), I booted with it, but no success, still stuck at the same place. No matter what I try, ingest stuck at "PCI configuration begin" (sometimes I get a few lines past that, but it's just random, and it stops just the same. I tried different Clover options, ATIInject on and off, VBiosSomeThing on and off. I tried npci=0x2000, npci=0x3000, GraphicsEnabler=Yes / No (even though I think it is useless with Clover), PCIRootUID=0/1, pci=off, -f, -F, -x (which stops me from seeing the verbose awkwardly), IPGEnable-No, cpus=1, arch=i386, and I tried lots of combinations of those flags. I obviously tried to change from switch to discrete in the relevant BIOS option, but then I get an other very annoying problem: I can't seem to get passed the "PCI configuration begin" phase during initialization, no matter how many bootflags I use. But they were talking about Nvidia optimus specific system. I thought about disabling the internal GPU via DSDT, but I read somewhere that it might be more complicated than to disable the discrete GPU (I saw somewhere it can be done with _OFF() in the INIT() method) because we need to redirect the outputs to the discrete card. I have no switching or energy saving option in Power Management Use gfxCardSatus to force MacOS into using my ATI, but it won't start (Unsupported material error message) no matter the SMBios (even configurations supposed to have the dual GPU) Profondeur de pixels : Couleurs 32 bits (ARGB8888) Informations sur l’extension du noyau : Aucune kext n’est chargée (means No kext loaded) This is what the graphics card looks like in System Reports: The problem is MacOS won't use it since it only boots on the integrated Intel GPU which is not supported as I understood (I have correct resolution with PatchVBIOS in Clover, but I get weird artifacts, very slow, etc.). Jeu de composants : ATI Mobility Radeon HD 4330 This is what I get (sorry, it's in French !) : I was amazed that it directly recognized it as 4330 and not as 4600 without me renaming anything, thanks to the injection (without it, the kext is loaded but not as Radeon Mobility) I only had to edit the ist from AMD4600Controller.kext in S/L/E and add my device ID (0x95521002), and use the inject ATI option in Clover to get my Radeon recognized by MacOS in System Report. ![]() I am running a working installation of MacOS X El Capitan with the latest Clover (I installed EFI, which works great, because the UEFI wasn't supported by my relatively old motherboard) The integrated one is Intel HD 4500 (GM45) and the discrete one is ATI Radeon Mobility 4330. I am currently experiencing a weird problem.
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