![]() ![]() To change systems to always boot to a 32-bit kernel, replace the “x86_64” section of the command with “i386.” In some instances, third-party kernel extensions might be 32-bit or 64-bit only, which will require booting to the respective kernel type in order to load. ![]() ![]() This command will change this so the system always boots to the 64-bit kernel. On Snow Leopard system, even though a 64-bit kernel is available, the system boots to the 32-bit one by default. Allows you to run commands as root to fix system. Boots your system with the bare minimum kexts.īoot into Single user mode, similar to Command-S at startup. Set the system to Verbose mode, similar to Command-V at startup.īoot into Safe Mode. Apple’s machines have a number of hidden boot options that you can use, though do keep in mind that most of these are for troubleshooting purposes and will only be useful to programmers. In addition to keyboard commands at startup, you can use the “nvram” terminal command to set a number of different boot options, which might be useful when troubleshooting your Mac. A common option is to hold the Shift key to boot to Safe Mode, but you can also hold Command-V for verbose mode or Command-S for Single User mode. When you boot your system you you can the keyboard at startup to alter the boot behavior.
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