Startup key combinations for Intel-based Macs
Keystroke
|
Description
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Press C during startup
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Start up from a bootable CD, DVD, or USB thumb drive (such as OS X install media).
|
Press D during startup
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Start up in Apple Hardware Test (AHT).
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Press Option-Command-P-R until you hear startup sound a second time.
| |
Press Option during startup
|
Start up in Startup Manager, where you can select an OS X volume or network volume to start from.
|
Press Eject, F12, or hold the mouse or 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 Target Disk Mode.
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Press Shift during startup
|
Start up in Safe Boot mode and temporarily disable login items.
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Press Command-V during startup
|
Start up in Verbose mode.
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Press Command-S during startup
|
Start up in Single-User mode.
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Press Option-N during startup
|
Start from a NetBoot server using the default boot image.
|
Press Command-R during startup
|
Start from the OS X Recovery System1
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