Marco1984 Posted August 27, 2017 Share Posted August 27, 2017 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. Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted August 28, 2017 Moderators Share Posted August 28, 2017 Try this guide, should support T420s too You'll need a modded whitelist BIOS to replace the wireless card with a supported card. Link to comment Share on other sites More sharing options...
Marco1984 Posted August 28, 2017 Author Share Posted August 28, 2017 Hi Jake I followed the guide but I receive all time this error. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Administrators Hervé Posted August 28, 2017 Administrators Share Posted August 28, 2017 You need to activate AICPUPM aka AsusAICPUPM aka AppleIntelCPUPowerManagement patch on Sandy Bridge and Ivy Bridge platforms. User Clover Configurator app to tune your Clover config. Link to comment Share on other sites More sharing options...
Marco1984 Posted August 28, 2017 Author Share Posted August 28, 2017 Hi Hevre i do that prove but it's same screen Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Marco1984 Posted August 28, 2017 Author Share Posted August 28, 2017 Here is my EFI. thanks for your help EFI.zip T420s.htm.zip Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted August 28, 2017 Moderators Share Posted August 28, 2017 His guide has a more current bootpack. Update it and try again. If still the same error, temporarily add NullCPUPowerManagement.kext to /EFI/Clover/kexts/Other Link to comment Share on other sites More sharing options...
Marco1984 Posted August 28, 2017 Author Share Posted August 28, 2017 Hi Jake what can i update? I don't know what. I tray to install NullCPU now. Thanks Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted August 28, 2017 Moderators Share Posted August 28, 2017 https://github.com/tluck/Lenovo-T420-Clover/releases/tag/v2017.08.27 under Source Code (zip) Link to comment Share on other sites More sharing options...
Marco1984 Posted August 28, 2017 Author Share Posted August 28, 2017 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 Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
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