OPTION 1: This error manifests itself on OS X 10.8 Mountain Lion only if you boot your Hackintosh with UseKernelCache=Yes, as booting with “-f” results in a normal boot sequence.
The reason is believed to be due to a timing change Apple has introduced in the IOAHCIBlockStorage.kext, results in a bug on Hackintosh builds: the system enumerates the disk partitions too fast and the boot partition gets skipped. The fix involves patching the IOAHCIBlockStorage.kext and adding a slight delay that allows enough time for disk enumeration.
The shell script patcher is available from the [Link removed to comply with Google AdSense and copyright guidelines], but if you prefer to do everything by hand yourself, here is the list of the commands:
cd /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS
sudo mv IOAHCIBlockStorage IOAHCIBlockStorage.orig
sudo cp IOAHCIBlockStorage.orig IOAHCIBlockStorage
sudo /usr/bin/perl -pi -e 's|\xeb\x4c\x00\x00\xea\x03|\xeb\x4c\x00\x00\xe8\x01|g' IOAHCIBlockStorage
sudo /usr/bin/perl -pi -e 's|\x74\x0e\x48\x8d\x3d\xa5\x90\x00\x00|\xbf\xc8\x00\x00\x00\x90\x90\x90\x90|g' IOAHCIBlockStorage
sudo touch /System/Library/ExtensionsReboot and see if this fixes the problem for your Hackintosh.
OPTION 2:
The following commands place a backup of the unmodified binary before patching it.
cd /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS
sudo mv IOAHCIBlockStorage IOAHCIBlockStorage.orig
sudo cp IOAHCIBlockStorage.orig IOAHCIBlockStorage
sudo /usr/bin/perl -pi -e 's|\xbb\x4b\x00\x00\xeb\x03|\xbb\x4b\x00\x00\xe8\x01|g' IOAHCIBlockStorage
sudo /usr/bin/perl -pi -e 's|\x74\x0e\x48\x8d\x3d\xb2\x91\x00\x00|\xbf\xc8\x00\x00\x00\x90\x90\x90\x90|g' IOAHCIBlockStorage
sudo touch /System/Library/ExtensionsUpdate: This patch DOES NOT work for 10.8.2′s IOAHCIBlockStorage.kext
OPTION 3:Here is the updated fix for 10.8.2′s version of IOAHCIFamily.kext. Don’t copy-paste everything into the Terminal at once, do it one line at a time. Pasting the whole code at once will result in the second half of the commands being used as your password at the first sudo command.
The following commands place a backup of the unmodified binary before patching it.
cd /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS
sudo mv IOAHCIBlockStorage IOAHCIBlockStorage.orig
sudo cp IOAHCIBlockStorage.orig IOAHCIBlockStorage
sudo /usr/bin/perl -pi -e 's|\x8b\x4a\x00\x00\xeb\x03|\x8b\x4a\x00\x00\xe8\x01|g' IOAHCIBlockStorage
sudo /usr/bin/perl -pi -e 's|\x74\x0e\x48\x8d\x3d\x72\x92\x00\x00|\xbf\xc8\x00\x00\x00\x90\x90\x90\x90|g' IOAHCIBlockStorage
sudo touch /System/Library/Extensions
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