
474 switching to the mac: the missing manual
(In such situations, user panic might be the more applicable term, but that’s program-
mers for you.)
Kernel panics are extremely rare. If you see one at all, it’s almost always the result
of a hardware glitch—most often a bad memory (RAM) board, but possibly an ac-
celerator card, graphics card, SCSI gadget, or USB hub that Mac OS X doesn’t like.
A poorly seated AirPort card can bring on a kernel panic, too, and so can a bad USB
or FireWire cable.
If simply restarting doesn’t solve the problem, detach every shred of gear that didn’t
come from Apple. Restore these components to the Mac one at a time until you find
out which one was causing Mac OS X’s bad hair day. If you’re able to pinpoint the
culprit, seek its manufacturer (or its Web site) on a quest for updated drivers, or at
least try to find out for sure whether the add-on is compatible with Mac OS X.
Tip: This advice goes for your Macintosh itself. Apple periodically updates the Mac’s own “drivers” in the
form of a firmware update. You download these updates from the Support area of Apple’s Web site (if indeed
Mac OS X’s own Software Update mechanism doesn’t alert you to its existence).
There’s one other cause for kernel panics, by the way: moving, renaming, or chang-
ing the access permissions for Mac OS X’s essential system files and folders—the
Applications or System folder, for example. ...