We have received word that a package coming through Apple's Software Update is causing some systems to "kernel panic," i.e. crash and not reboot.

The update in question is "Thunderbolt 1.2." Thunderbolt is Apple's successor to Firewire and this update includes some new drivers that have been shown this morning to crash some Macintosh systems. This is especially true of MacBook Pro systems.

We suggest that you not install this update to prevent the possible issue with kernel panic. This does *not* apply to all Apple updates including future Thunderbolt updates.