Guest Posted November 22, 2020 Share Posted November 22, 2020 Hi @jpressinger, Here the EFI Opencore for Big Sur. Hope help you and others! EFI LENOVO BIG SUR.zip NB: im test everithing and also works fine in High Sierra (final) and Catalina!!! Link to comment Share on other sites More sharing options...
zmvlakjfdsa Posted February 7, 2021 Share Posted February 7, 2021 thanks for the EFI, I was able to install Big Sur 11.2 on my E470. But I don't have Bluetooth and no sound (I can see microphone input level changes when I speak, but no audio out). Could you please help. My EFI is attached. I only include OpenCore in the EFI for small size. EFI.zip Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted February 8, 2021 Moderators Share Posted February 8, 2021 @zmvlakjfdsa what wifi/BT combo does it have? Link to comment Share on other sites More sharing options...
zmvlakjfdsa Posted February 8, 2021 Share Posted February 8, 2021 WIfi: Qualcomm Atheros QCA9377. I have no wifi which is expected, but I don't have bluetooth which is weird. Audio: Conexant CX20753/4. I can see audio input level changes when I speak, but there is no sound out. Link to comment Share on other sites More sharing options...
Administrators Hervé Posted February 8, 2021 Administrators Share Posted February 8, 2021 Nothing weird with having no Bluetooth working if that's what you meant. Would be a Qualcomm Atheros module too and those were also finicky when not plain unsupported. https://wikidevi.wi-cat.ru/Qualcomm_Atheros_QCNFA435 Replace that unsupported QCA card by a supported Broadcom model. Link to comment Share on other sites More sharing options...
ohr Posted February 9, 2021 Share Posted February 9, 2021 Thank you very much for your EFI, but the computer cannot wake up after sleep Link to comment Share on other sites More sharing options...
Administrators Hervé Posted February 9, 2021 Administrators Share Posted February 9, 2021 https://osxlatitude.com/forums/topic/9966-how-do-i-disable-hibernation-for-sleep/?tab=comments#comment-71887 Link to comment Share on other sites More sharing options...
ohr Posted February 11, 2021 Share Posted February 11, 2021 Is there a microphone driver or microphone EFI for Lenovo E470 opencore? Link to comment Share on other sites More sharing options...
Administrators Hervé Posted February 11, 2021 Administrators Share Posted February 11, 2021 2 x comments: Microphone is under the control of the audio driver, whether you use AppleALC (which works with AppleHDA) or VoodooHDA (which disables AppleHDA). Then, it's down to a matter of the kexts having the correct definitions for the Codec. No such thing as a "microphone EFI". Please search the forum before posting as your issue has already been reported and addressed here. Link to comment Share on other sites More sharing options...
Guest Posted February 14, 2021 Share Posted February 14, 2021 Thanks @Hervé and @Jake Lo to help people. Sorry late answer, because im not receive any notifications about this post. On 2/11/2021 at 6:46 AM, ohr said: Is there a microphone driver or microphone EFI for Lenovo E470 opencore? My microfone works nice, its necessary know how is your codec and modified in Nvram alcid=X (number of your codec). Link to comment Share on other sites More sharing options...
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