Startup key combinations for Intel-based Macs
By Joe Ryan Monday, October 19, 2009.
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| Keystroke |
Description |
| Press C during startup |
Start up from a bootable CD or DVD, such as the Mac OS X Install disc that came with the computer. |
| Press D during startup |
Start up in Apple Hardware Test (AHT), if the Install DVD 1 is in the computer. |
| Press Option-Command-P-R until you hear two beeps. |
Reset NVRAM |
| Press Option during startup |
Starts into Startup Manager, where you can select a Mac OS X volume to start from. Note: Press N to make the the first bootable Network volume appear as well. |
| Press Eject, F12, or hold the mouse (/trackpad) button |
Ejects any removable media, such as an optical disc. |
| Press N during startup |
Attempt to start up from a compatible network server (NetBoot). |
| Press T during startup |
Start up in FireWire Target Disk mode. |
| Press Shift during startup |
Start up in Safe Boot mode and temporarily disable login items. |
| Press Command-V during startup |
Start up in Verbose mode. |
| Press Command-S during startup |
Start up in Single-User mode. |
| Press Option-N during startup |
Start from a NetBoot server using the default boot image. |
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