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.
Freelance technical writer and director of Long Island Mac Help - the essential source of in-house macintosh training and support. Skilled and well-versed in social media promotion, web site and commerce integration. Currently serves as technical advisor and member of the board of 4eProductions - a multi media production company. Dedicated to serving and providing perfect workflow.
Other Sites