Links
| Keystroke (during startip) | Description |
|---|---|
| C | Start up from a bootable CD, DVD, or USB thumb drive (such as OS X install media). |
| D | Start up in Apple Hardware Test (AHT). |
| Option-Command-P-R until you hear startup sound a 2nd time. |
Reset NVRAM |
| Option | Start up in Startup Manager, where you can select an OS X volume or network volume to start from. |
| Eject, F12, or hold the mouse/trackpad button |
Ejects any removable media, such as an optical disc. |
| N | Attempt to start up from a compatible network server (NetBoot). |
| T | Start up in Target Disk Mode. |
| Shift during startup | Start up in Safe Boot mode and temporarily disable login items. |
| Command-V | Start up in Verbose mode. |
| Command-S | Start up in Single-User mode. |
| Option-N | Start from a NetBoot server using the default boot image. |
| Command-R | Start from the OS X Recovery System |