various keys that do various things when a mac is starting up. ..
| what? | what? |
| ⌘(splat/apple)&s | single user mode |
| t | firewire target disk mode |
| c | startup from cd |
| shift | safeboot/ no extensions |
| alt | open firmware boot |
| ⌘(splat/apple),alt,o&f | Open Firmware cli |
| ⌘(splat/apple),alt(option),p&r | “zap the pRAM!!!” |
| ⌘(splat/apple)&v | verbose startup |
- restetting the SMC → https://support.apple.com/kb/HT3964