Key Startup Keys: Apple MacOS X Boot Key Combos

Here is a list of the key boot keys for Apple MacOS X. Wether you need to startup from CD to use a system disk or need to startup the bosses machine in firewire mode for a quick backup of intellectual property this is the handy list for you.

Hold down the following keys during startup for the desired effect

• Boot from CD: C
• Boot first internal Drive: D
• Boot from External Drive or CD: CMD-OPT-SHIFT-DELETE
• Startup in Firewire mode: T
  
• Flash PRAM: CMD-OPT-P-R (Erases PRAM, hold until chime)
• Disable Extensions: SHIFT
• Rebuild Desktop: CMD-OPT
• Eject removable media: Mouse Button
  
• Single-user mode: CMD-S (shell-level mode)
• Verbose Mode: CMD-V (watch the system load)