O'Reilly logo

Macintosh Troubleshooting Pocket Guide for Mac OS by Tekserve Corporation, Aaron Freimark, David Lerner

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Appendix A. Command Key Combinations

Commands for Mac OS 9.x and below

Disable extensions at startup:

Shift while booting, keep pressing to also disable startup items

Open Extensions Manager at startup:

Spacebar while booting

Close all open windows:

Option while Finder loads (can fix weirdness)

Rebuild Desktop:

image with no caption

-option while booting (but read the question about this)

Zap PRAM (restore defaults)—System 6:

image with no caption

-option-shift while opening Control Panel

Reset Applevision Display (v1.52 or later):

image with no caption

-option-a-v while booting

Commands for Mac OS 9.x and below and for Mac OS X

Startup Manager (most recent Macs):

Option while booting, allows you to choose which volume to boot from if you have more than one startup volume or CD

Boot from CD-ROM (most recent Macs):

“c” while booting

FireWire Target Mode

“t” while booting

Ignore internal hard disk drive:

image with no caption

-option-shift-delete while booting (some Macs ignore selected startup device)

Zap PRAM (restore defaults)—System 7 and up:

-option-p-r while booting

Force Quit current application:

-option-escape (In OS 9 ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required