Habib Rahman Posted May 20, 2022 Author Share Posted May 20, 2022 I have now installed big sur on this E7420 EFi but Montrey does not work. My laptop is actually E7440 model but for big sur work E7420 Efi. its named by techobilabs_Dell E7240 EFI. when iam trying install montery 12.3.1 by this efi it show this message "A required firmware update could not be installed" as shown on post #1. This is the link of efi which is work for me in the installing of big 11.1 http://www.mediafire.com/file/qzx8ldugwol8o72/file Link to comment Share on other sites More sharing options...
Administrators Bronxteck Posted May 23, 2022 Administrators Share Posted May 23, 2022 https://dortania.github.io/OpenCore-Install-Guide/troubleshooting/extended/userspace-issues.html#stuck-on-your-mac-needs-a-firmware-update-in-order-to-install-to-this-volume Link to comment Share on other sites More sharing options...
Baio77 Posted May 23, 2022 Share Posted May 23, 2022 https://drive.google.com/drive/folders/18UTQJU7g1kfsVoN9XyXRq41y4ssCmHzg?usp=sharing Test this EFI if start ioreg . OC 0.8.1 + kext release Link to comment Share on other sites More sharing options...
Habib Rahman Posted June 10, 2022 Author Share Posted June 10, 2022 thanks this is work for me but it mouse in not working how can i fix it is wifi,touch and mouse Link to comment Share on other sites More sharing options...
Administrators Hervé Posted June 10, 2022 Administrators Share Posted June 10, 2022 Afaik, the E7440 should be fitted with an Alps TouchPad like other Latitude of those days. That's normally fully operational with DrHurt's VoodooPS2Controller kext available here. Link to comment Share on other sites More sharing options...
Recommended Posts