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Serial Number R9PPAZN Machine Type Model 4284EY9 Spec Info: i7-2820QM(2.3GHz), 16GB RAM, 512gb SSD, 15.6in 1366x768 LCD(i disabled this display and using external monitor), 2GB Nvidia Quadro 1000M, Intel 802.11agn, WWAN option, Bluetooth,Modem,1Gb Ethernet, UltraNav, Secure Chip, FPR, Camera,9c Li-Ion,Win10 Pro 64 Processor Intel(R) Core(TM) i7-2860QM CPU GPU: NVIDIA Quadro 1000M USB/Chipset Intel(R) 6 Series/C200 Series , Renesas USB 3.0 eXtensible Host Controller BIOS Version: LENOVO 8BET66WW (1.46 ) i wanted to create a hackintosh that supports quadro 1000m gpu ( igpu and optimus disabled in bios, set to dgpu mode and connected to external display via displayport ) im planning to install el capitan as i heard it does not have any artifacts or other gpu related issues in this system so far after following the guide on this page and im stuck on blank screen while booting throught usb drive. i have tried tluck's guide from https://www.insanelymac.com/forum/topic/285678-lenovo-thinkpad-t420-with-uefi-only/page/20/?tab=comments#comment-1952283 but still im unable to move past boot screen. p.s software isnt my kinda thing im more of a hardware type of guy i have currently windows 10 installed in this system and created almost perfect big sur hackintosh on lenovo ideapad slim 3 15itl6 using this great guide by @Trijintosh but im unable to recreate the same success on my thinkpad w520 ;( im attaching my bios setting images it is default settngs except for display which i changed to discreet, external monitor via display port and disabled optimus Bios settings.zip