I hardly ever restart my ancient PowerBook, but when I do I can never remember the correct keystrokes for different startup procedures. Press these during startup:
- X: Force Mac OS X startup
- C: Start up from a bootable CD
- N: Attempt to start up from a compatible network server (NetBoot)
- T: Start up in FireWire Target Disk mode
- Opt-Cmd-Shift-Delete: Seeks a different startup volume (e.g CD or external disk)
- Shift: Start up in Safe Boot mode (temporarily disables login items and non-essential kernel extension files)
- Cmd-V: Start up in Verbose mode
- Cmd-S: Start up in Single-User mode
