| 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 |
MAC OS BOOT KEY LIST: Hold down these Boot Keys while the computer is starting up
