This could be bad, Apple-y speaking.
My step son’s Mac won’t boot up. It’s getting a core dump on the screen with some debugger information when he turns it on. We haven’t had time to really investigate or troubleshoot but… ouch.
I also just started installing an update to Garageband.
The last time that happened it totally ruined my day.
Duck and cover, kids.
Inside the Red Head's Head 