cybermac Posted March 20, 2022 Share Posted March 20, 2022 Hi there, I have a Latitude 7280 and wanted to do a Monterey installation. For this I used the EFI from Lorys89: https://github.com/Lorys89/DELL_LATITUDE_7280 Unfortunately I can't get into the setup, it always gets stuck at using 16384 buffer headers and 10240 cluster IO buffer headers... I don't know what to do next... Thanks! Components: CPU: Intel Kaby Lake i5-7300U iGPU: Intel HD 620 Graphics LAN: Intel I219-LM Audio: Realtek ALC256 RAM: Original 8 GB DDR4 2133 Mhz Wifi + Bluetooth: Intel AC 8265 Disk: SAMSUNG 980 NVME SSD 1TB (macOS+Win11) I use: SmBios: MacBookPro 14,1 BootLoader: OpenCore 0.7.9 macOS: Monterey 12.3 Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted March 20, 2022 Moderators Share Posted March 20, 2022 Post your EFI folder and a screenshot of your error Link to comment Share on other sites More sharing options...
cybermac Posted March 20, 2022 Author Share Posted March 20, 2022 As already written, I used the EFI from Lorys89 because our systems are the same. I only removed the KEXTs for the DW1560 as I still have the original intel inside. THX EFI.zip Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted March 21, 2022 Moderators Share Posted March 21, 2022 Not sure where the problem lies but give this a try. Upgraded to OC 079 Make sure your BIOS settings are set Secure boot disabled AHCI enabled UEFI 7280_OC079.zip Link to comment Share on other sites More sharing options...
cybermac Posted March 21, 2022 Author Share Posted March 21, 2022 Got Kernal panic with this EFI... Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted March 21, 2022 Moderators Share Posted March 21, 2022 post KP screenshot Link to comment Share on other sites More sharing options...
cybermac Posted March 22, 2022 Author Share Posted March 22, 2022 Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted March 22, 2022 Moderators Share Posted March 22, 2022 Did you disable CFG Lock and set DVMT pre-allocation to 64MB per the guide you followed? If not, then replace the config file with this one config.plist.zip Link to comment Share on other sites More sharing options...
cybermac Posted March 22, 2022 Author Share Posted March 22, 2022 CFG Lock is disabled and DVMT is set to Max Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted March 23, 2022 Moderators Share Posted March 23, 2022 Did you set the DVMT pre allocated as well? For set CFG LOCK Disabled setup_var 0x4ED 0x0 For set DVMT PRE Allocated to 64 MB setup_var 0x795 0x2 For set DVMT Total GFX Mem to MAX setup_var 0x796 0x3 Link to comment Share on other sites More sharing options...
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