Mac OS Boot Key Combos
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Apple Boot Key Combos
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| Bypass startup drive and boot from external (or CD) Note: The system checks for bootable System folders in the following order with this command: Internal Drives, External Drives, and CD Drive. | CMD+OPT+SHIFT+DELETE |
| Boot from CD (Most late model Apple brand Macs) | Hold down "C" |
| Boot from a specific SCSI ID # (# = SCSI ID number) | CMD+OPT+SHIFT+DELETE+# |
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Zap PRAM (It's best to hold the key sequence til your mac chimes 5 times). Also, probably a better way is to use the Freeware TechTool 1.2.1 for PRAM zaps and Desktop Rebuilds. Download it Here. |
CMD+OPT+P+R |
| Disable Extensions | SHIFT |
| Rebuild Desktop (If you do it this way you will lose all Get Info comments in files. See the link above for TechTool...it will save your comments.) | CMD+OPT |
| Start without Finder windows open | Hold down OPTION |
| Boot with Virtual Memory Off | COMMAND |
| Trigger Extensions Manager at boot-up | SPACE |
| Force Quadra AV machines to use TV as a monitor | CMD+OPT+T+V |
| Boot from ROM (Mac Classic Only...does anyone still use one?? hehee) | CMD+OPT+X+O |
| Force PowerBooks to reset the screen | Hold down "R" |
| Force an AV monitor to be recognized as one | CMD+OPT+A+V |
| Eject boot floppy | Hold Down Mouse Button |
| Open Firmware | CMD+OPT+O+F (letter O, not Zero) |
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After Startup
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| Bring up dialogue for shutdown/sleep/restart | POWER KEY |
| Eject a Floppy Disk | CMD+SHIFT+1 or +2 or +0 |
| Force current app to quit | CMD+OPT+ESC |
| Unconditionally reboot | CTRL+CMD+POWER |
| Fast Shutdown | CTRL+CMD+OPT+POWER |
| Go to the debugger (if MacsBug is installed) | CMD+POWER |
| Put late model PowerBooks & Desktops to sleep | CMD+OPT+POWER |
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Application Specific Keys
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Startup key combos to reset the resolution on video
boards
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| SuperMac (at least some models) | Press and Hold OPTION |
| magine 128 Card (reset resolution) | Press and Hold "N" |
| RasterOps (at least some models) | Press and Hold CMD+OPT+SHIFT |
| Radius (Use cable sense pins to set resolution) | Press and Hold "U" |
| Radius (Cycle through available resolutions) | Press and Hold "T" |
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Conflict Catcher
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| Pause Boot | Hold down "P" |
| Launch CC at Startup | SPACE (or Caps Lock if you set prefs that way in CC) |
| Skip Remaining Extension | CMD+PERIOD |
| Reboot Cleanly while loading extensions | CMD+R |
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Apple System Installer
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| Change custom install to clean install | CMD+SHIFT+K |
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Claris Emailer
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| Bypass specified startup connections | Hold CMD at Launch |
| Bring up rebuild options | Hold OPT at launch |
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Other Keyboard Shortcuts (and links to them)
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| Keyboard Shortcuts for QuickTime 4.x (Mac and Windows) | See This Link |
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