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원문 게시자: GhostMik ,

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Unfortunately I think is the graphic card too..

One chance to test is the health of your hard drive in case bad sector could leas the OS the bad kext read..

If you can test your Imac this way, prepare a usb thumb with the OS installer using diskmaker x from another mac and a formatted usb external drive and try to install the OS  on it.

The first attemp to boot to the usb thumb will show you simptomps and probably won't be able to install anything 'cause of the bad graphic cards but If your system go ahead try to full install the OS and see what happen at the first boot..

If the gpu is gone and you're out of warranty the Last resort solution would be to teard down the logic board from the Imac and bake it into the oven as for macbook pro logic board, depends on your skill..

I cross my finger for you.. Let me know..

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