robi62 Posted April 21 Share Posted April 21 On 10/27/2021 at 2:47 PM, angelts said: Try my Monterey EFI EFI.zip Hi I have a 640 g1 which in bigsur works ok but all efi I tried for monterey no joy it doesn t boot As soon at it start after welcome screen when I choose disk it reboots ... The only thing I can think of is something wrong in my bios setup?? But works with bigsur.... Quote Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted April 21 Moderators Share Posted April 21 @robi62 Upgrade OC and the kexts to the latest Quote Link to comment Share on other sites More sharing options...
robi62 Posted April 21 Author Share Posted April 21 Easy if you know how is not only the kexts that would be easy is the config the difficult part Quote Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted April 21 Moderators Share Posted April 21 Post your Big Sur files include IOReg file is possible Please include your system specs as well Quote Link to comment Share on other sites More sharing options...
robi62 Posted April 21 Author Share Posted April 21 here are my files MacBook Pro.zip EFI-640g1mn.zip Haswell platform Quote Link to comment Share on other sites More sharing options...
Administrators Hervé Posted April 21 Administrators Share Posted April 21 Start here maybe: https://www.insanelymac.com/forum/782-opencore-releases/ Careful as you may not manage to get your BCM43224 wireless card working underMonterey... So proceed with the understanding that you're highly likely to require a change of wifi card. Quote Link to comment Share on other sites More sharing options...
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