Key What it does
C boot from optical drive drive (CD or DVD) drive
N boot from NetBoot image
T target disk mode, computer acts as a firewire hard drive and can be connected to another computer, allowing you to run diagnostics
X “X-Ray” key (resets startup disk selection)
Command-S Single User mode
Command-V Verbose Mode
Shift safe boot mode
Option key boot choice mode (also known as boot into open firmware), displays available boot hard drives and give you a choice of which one to boot from
Cmd-Option-O-F open firmware mode, lets you see what the current firmware is
Cmd-Option-P-R reset parameter RAM
Cmd-Option-Shift-Delete bypass internal hard drive
Mouse button eject removable media

By Jason

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