MacOS Leopard Repair Tricks – Startup Keystrokes
by mboulou on October 6, 2009
Yesterday a friend of mine give me his MacBook Pro with nothing seen in Monitor but a soft blue screen ( Its the Apple version of famous Windows Screen Of Death).
It was my first time facing critical problems in Leopard.Here is a small list with things to do in order to have a chance to fix your Mac.
- At first try to startup the system in Safe Mode.
- If you have logged in you safe mode system, do a backup of critical files and go to DiskUtility Application for Disk Check and Repair Permissions.
- If it is impossible to boot the system in graphical mode ( so you cat run DiskUtility app), Do a boot in Verbose Mode and try to see the problem.
- If nothing works, just get into Single User Mode and do fsk and mount rw.
For a complete table of boot combinations :
| 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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