Moore Solutions

I.T. fixes & Information for just about anything…

July 23rd, 2011

Here is a list of useful start up key combinations you can use with Intel-based Macs (MacBook Pro, MacBook Air, MacBook, iMac, Mac mini
and Mac Pro)

Note: The keys below require you to press and hold the keys as soon as you hear the start-up tone.

Press C during start up:

Start up from a bootable CD or DVD, such as the Mac OS X Install disc that came with the computer.

 Press D during start up:

Start up in Apple Hardware Test (AHT) mode.

Press Option-Command-P-R until you hear two beeps:

Resets NVRAM.

 Press Option during start up:

Starts into “Start up Manager”, where you can select a Mac OS X volume to start from. (Note: Press N to make the first bootable Network volume appear as well.)

Press Eject, F12, or hold the mouse or trackpad button:

Ejects any removable media, such as an optical disc.

Press N during start up:

Attempt to start up from a compatible network server (NetBoot).

Press T during start up:

Start up in Target Disk Mode.

Press Shift during start up:

Start up in Safe Boot mode and temporarily disable login items.

 Press Command-V during start up:

Start up in Verbose mode.

Press Command-S during start up:

Start up in Single-User mode.

Press Option-N during start up:

Start from a NetBoot server using the default boot image.


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