I recently booted my mac book to a Knoipix cd to show off to some friends how capable the macintosh hardware is. But now when I try to boot it back to Mac OS, it gives me a "No Bootable device -- insert boot disk and press any key" error. The logical response would be to Option boot it, as par the answer i found here, but it's a company machine, not my own, so there is a firmware password on it which I can not unlock. I've tried resting the PRAM, but it has never worked. It's a late 2009 white plastic uni-body macbook. Any way around this?