Kernel 64 EFI Patch OS X 10.2.6
Written on January 14, 2010 – 10:25 pm | by admin

Special case if
#systemsetup -setkernelbootarchitecture x86_64
cannot run while restarting, or by pressing “6″ and “4″ while loading
To run 64-bit kernel on any mac with 64-bit efi you need patched boot.efi file
You can find file named boot64.efi from your own OS, patch the boot.efi to enables 64 bit kernel
It enables 64-bit kernel support for some macmini/macbook/imac/macbookair models, which has 64-bit efi bootrom.
run these commands
cd ~/Desktop
sudo cp /System/Library/CoreServices/boot.efi /blah/user/Desktop/boot64.efi
edit the binary with hexeditor, example im using mac mini and replacing the value like stated below

Then
sudo cp /Users/blah/Desktop/boot64.efi /System/Library/CoreServices/
cd /System/Library/CoreServices/
sudo chown root:wheel boot64.efi
sudo chflags uchg boot64.efi
sudo bless --folder /System/Library/CoreServices/ --file /System/Library/CoreServices/boot64.efi
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