Marco1984

Hi Hervé can please help me? thanks Sent from my iPhone using Tapatalk Pro

Hi Hervé thanks for your answer, I'm using intel iGPU in integrate mode,because nVIDIA doesn't work in my lenovo.

What can i do in this case?

Thanks

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Hi everyone! I have problem with my Lenovo I can't do login because the screen is black like picture. Can you please help me thanks

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Has anyone successfully installed El Capitan on T420s? Any suggestions on how I might be done.

Can someone help me.

Thank you

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already tried NvidiaGraphicsFixup & Lilu which lead to the above screenshot. If nv_disable=1 enabled, it'll have no QE/CI. I guess NVS4200m is really not supported but works perfectly on El Capitan.

Just need the BIOS set with Optimus so HD 3000 can be use instead but the BIOS kept resetting after each restart.

AppleRTC hotpatch doesn't seem to be working, similar to the Dell Optimus.

Going to try RTC8Allow and see if that have any affect.

Hi Jake I tried with El Capitan but I had same problem than Sierra Optimus doesn't work.

With dsdt you passed to me brightness and sleep mode doesn't work. Thanks for helping

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I found web drivers but it says for "el cap" http://www.nvidia.com/download/driverResults.aspx/100824/en-us

Hi does nvidia web driver work with El Capitan?

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Hi Jake I tried but it's same I think the nvidia is loaded.

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Hi Jake I tried your config. But i get this error. Thanks

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No I tried to check the KP on clover configurator, this pc have nVIDIA NVS 4200M, intel i7 -2640M, GPU=GF119GLM

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I have black screen is going little bit in verbose mode after that the screen goes black like pictures but pc is on.

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Hi Jake I tried to change Kernel but I can't boot from usb

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Yes USB isn't bootable! Kp during installation.

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I just updated Jake but same problem I can't boot from usb to install Sierra.

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Hi Jake I have already installed macOS, but i had problems and I want to install clean install. But the problem is because the screen is all black

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Hi Jake what can i update? I don't know what. I tray to install NullCPU now. Thanks

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Here is my EFI. thanks for your help 

EFI.zip

T420s.htm.zip

Hi Hevre i do that prove but it's same screen

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Hi Jake I followed the guide but I receive all time this error.

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Hi everyone, I'm trying to install sierra but nothing.I have problem with installation,I'm using clover. Please can someone help me thanks.

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Hi Jake I'm trying to repair permissions but i get all time error. About FaceTime I filled the guide but i can't fix iMessage. Thanks

Ho Jake I found Acpi in s/l/e and in kext other and I deleted both but still have problems with brightness. For wifi i use USB adapter and its ok. But please help me with brightness when i go to do reapir permissions and i can not.

this is the problem with terminal

Screen Shot 2017-08-09 at 17.24.34.zip

Terminal.zip

I don't have ACPIBacklighte installed. And about wifi doesn't work command. Jake please how can a fic FaceTime and iMessage I'm trying to fix by self but I can't.

hi Jake i still have problem with brightness and wifi and i attach photo with wifi seting and when i go to repair permisison i have problem i think. thanks. sorry another question is normal now i can login in facetime and imessage those worked before.

IO Reg.zip

Screen Shot 2017-08-09 at 11.37.54.zip

Repair Permission.zip

Hi Jake i still have problem with brightness and Nvidia web driver thanks

Screen Shot 2017-08-08 at 23.37.40.zip