Following are some of the most commonly used boot key sequences for recent Macs (with Open Firmware or Extended Firmware Interface).
- c = boot from CD
- n = attempt to boot from network server (using BOOTP or TFTP)
- t = boot into FireWire Target Disk mode
- shift = safe mode, disable login items and non-essential kernel extensions (OS X, 10.1.3 and later)
- hold down mouse = eject CD/DVD from drive
- cmd-v = verbose mode, show console messages during boot
- cmd-s = boot into single user mode
- cmd-opt-shift-delete = boot from external disk drive (or CD)
- opt = show Open Firmware system picker (PowerPC only)
- cmd-opt-o-f = boot into Open Firmware (PowerPC only)
- cmd-opt-p-r = reset parameter RAM (PRAM)
