~pcwiz Posted August 27, 2007 Share Posted August 27, 2007 If you installed an update and your OS won't boot, here are instructions to restore your kernels and extensions from single user mode if you backed them up: Boot to the boot prompt (tap F8 when machine is starting) Type in -s and hit enter You will boot to a text command prompt Here is the command used to restore kernels: sudo cp -R /mach_kernel You have to replace with the path of your old kernel, example: /mach_kernel.old Here is the command to restore extensions: sudo cp -R /System/Library/Extensions/.kext Replace with the path of the extensions you backed up, for example: /System/Library/Extensions.old Replace with the name of the extension you want to replace, for example: AppleSMBIOS Type in 'quit' without quotations to save changes and reboot Link to comment Share on other sites More sharing options...
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