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      Latest reply on Dec 12, 2019 1:50 PM by nealsid
      nealsid Level 1 Level 1 (0 points)


        I recently purchased a Mac Mini (my first Mac with T2) and wanted to see what was the right way to debug the kernel with a debug/development kernel that I may have missed.  I disabled Secure Boot from Recovery Mode, but still found my debug/development kernel was not being picked up with the kcsuffix boot arg after I copied it into /System/Library/Kernels and invalidated the kext cache.

        What did work was to overwrite the immutablekernel file in the PrelnkKernels directory wih my debug/development kernel (I assumed that after I disabled Secure Boot it would not check the certificates or verify the integrity of the binar); is this the only way?  Is kcsuffix no longer supported with Secure Boot?