davidfrei7as Posted November 30, 2021 Share Posted November 30, 2021 Hi Guys, i'm trying to install mac os monterey on my latitude 3400, but i'm stucked on "IOG flags 0x3 (0x51)" error. can someone help me? OC.zip Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 1, 2021 Moderators Share Posted December 1, 2021 try this, updated to OC0.7.5. 3400 OC 0.7.5.zip Link to comment Share on other sites More sharing options...
davidfrei7as Posted December 1, 2021 Author Share Posted December 1, 2021 @Jake Lo It works! But the screen backlight is off when the installation screen loads. Then after a few minutes the backlight comes back on. How do I fix this problem? I managed to install successfully! all that's left is to solve this little problem. Thank you very much in advance. Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 1, 2021 Moderators Share Posted December 1, 2021 Does the issue continues after installation? Link to comment Share on other sites More sharing options...
davidfrei7as Posted December 1, 2021 Author Share Posted December 1, 2021 @Jake Lo Yes Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 1, 2021 Moderators Share Posted December 1, 2021 Had you tried resetting NVRam already? Link to comment Share on other sites More sharing options...
davidfrei7as Posted December 1, 2021 Author Share Posted December 1, 2021 @Jake Lo yes! When i was on Bigsur it happens with the whatever green after version 1.4.5 Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 1, 2021 Moderators Share Posted December 1, 2021 Can you describe in detail the issue? Screens stays black until login? Please post IOReg file using IORegistryExplorer.app v2.1 only Link to comment Share on other sites More sharing options...
davidfrei7as Posted December 1, 2021 Author Share Posted December 1, 2021 macOS starts loading, then the screen goes dark. But when you bring a light close to the screen, you can see that the system has loaded normally. After a few minutes the backlight returns to normal. Edit: I managed to solve the problem using bootarg "-igfxblr". Attached is my final EFI. Thanks for the help. EFI.zip Link to comment Share on other sites More sharing options...
Rajganesh Posted December 2, 2021 Share Posted December 2, 2021 @davidfrei7as Do you think this EFI will work for upgrade from BigSur to Monterey? Link to comment Share on other sites More sharing options...
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